Education
May 1986, University of British Columbia, Vancouver, BC
Ph.D. (Physics)
Thesis: The Interactions of Muonium with Silica Surfaces
June 1980, Western Washington University, Bellingham, WA
M.Sc. (Physics)
June 1978, Pacific Lutheran University, Tacoma, WA
B.Sc. (Physics)
Professional
Experience
Sep 2014 – Present, Department of Physics, College of William and Mary
Visiting Professor of Physics
Research – Principal Investigator
Aug 2014 – Present, University of Notre Dame
Consultant
Research
Aug 1999 – Jul 2014, Department of Physics, University of Notre Dame
Visiting (Aug 1999 – Jul 2004) / Adjunct (Aug 2004 – Jul 2014) Professor of Physics
Research – Principal Investigator
Sep 1999 – Aug 2011, Department of Physics, Arizona State University
Visiting (Sep 1999 – Aug 2002) / Adjunct (Sep 2002 – Aug 2011) Professor of Physics
Research – Principal Investigator
Feb 1997 – Present, Physikon Research Corporation
Vice President (Feb 1997 – Dec 2017) / President (Jan 2018 – Present)
Director of Research / President and CEO
May 1988 – Feb 1997, AT&T/Lucent Bell Laboratories, Murray Hill, NJ
Member of Technical Staff (MTS)
Research – Principal Investigator more
I was fortunate to be a part of the Bell Labs community in Murray Hill, NJ, prior to 1996. It was a very special place, where one could walk down the hall, knock on any door, and speak with any number of world experts in the physical sciences and more.
Pictures of my lab (rm 1A-207) at Bell Laboratories, 600 Mountain Avenue, Murray Hill, NJ
Mar 1986 – May 1988, AT&T Bell Laboratories, Murray Hill, NJ
Postdoctoral Fellow (Pre-Member of Technical Staff – PMTS)
Research
Jan 1986 – Mar 1986, Department of Physics, University of British Columbia
Postdoctoral Fellow
Research
Aug 1980 – Jan 1986, Department of Physics, University of British Columbia
Doctoral Candidate / Research Associate
Research / Teaching Assistant
Sep 1978 – Jun 1980, Department of Physics, Western Washington University
Masters Candidate
Research / Teaching Assistant
Selected Research Highlights
- Band-Gap Moderated Slow Positive Muon Beams – Dr. Harshman led the research group that discovered the first practical technique for producing a low-energy (<10 eV) positive muon beam. It was christened with the acronym, μSOL (muon separator on-line). The same 1986 paper reported the first observation of (< 10 eV) Mu– (i.e., μ+e–e–) ions in vacuum. In 1987, Harshman and co-workers increased the slow muon production rate by a factor of 100 using solid rare-gas moderators, producing a usable flux of slow muons. [Physical Review Letters 56, 2850 (1986)] [Physical Review B 36, 8850 (1987)]. ‡The slow muon production technique developed by Harshman and coworkers was adopted by the Paul Sherrer Institut (PSI) for their slow positive muon beam facility (the μSR Yamazaki Prize for this work was awarded to PSI personnel who placed this technology on the end of a PSI surface muon channel).
- Magnetic X-Ray Scattering in Holmium – By measuring the degree of linear polarization we identify the orbital and spin contributions to the x-ray magnetic scattering in holmium. When the incident x-ray energy is tuned through the Lm absorption edge, we observe a fiftyfold resonant enhancement of the magnetic signal, and resonant integer harmonics. The line shapes of the two linear components scattered parallel and perpendicular to the diffraction plane are distinct in energy with a 6-eV splitting. [Physical Review Letters 61, 1241 (1988)]. ‡This paper was the experimental work cited for the 2003 Arthur H. Compton Award, presented to its first and fourth authors, along with two others not directly involved with these experiments (Dr. Harshman declined first-authorship because of other obligations at the time). In addition to taking part in all aspects of this research, Dr. Harshman also commissioned and supervised the engineering of the novel x-ray spectrometer necessary for its success. During the experiment the acquisition computer failed; Dr. Harshman made the round trip from Cornell to Bell Labs to have it repaired.
- High-Temperature Cuprate Superconductor Pairing State Symmetry – In 1987 using muon spin rotation (μ+SR) and measuring sintered powder samples of YBa2Cu3O7–δ, Harshman and coworkers provided the first measurements of the magnetic penetration and proof that the bulk pairing state of the superconducting hole condensate was nodeless, consistent with s-wave pairing and strong coupling [Physical Review B 36, 2386 (1987)]. Harshman and co-workers were also the first to measure the 60 K (oxygen-ordered) phase of YBa2Cu3O7–δ. This research was followed by studies of heavily twinned single crystals of the same material, confirming the s-wave character and providing the first measurement of the mass anisotropy; mc ≥ 25 mab [Physical Review B 39, 851 (1989)]. In 1991, Harshman and co-workers presented μ+SR data on single-crystal Bi2Sr2CaCu2O8+δ showing a strongly temperature-dependent line shape, indicative of motional narrowing arising from fluxon depinning [Physical Review Letters 67, 3152 (1991)]. The fluxon lattice in earlier powder and heavily-twinned crystal samples of YBa2Cu3O7–δ was strongly pinned, suppressing fluxon depinning. However, by the mid 90’s, the quality of YBa2Cu3O7–δ crystals improved greatly, revealing a text-book example temperature-activated fluxon depinning. Unfortunately, some researchers misinterpreted the extrinsic effects of fluxon depinning as being evidence of d-wave pairing. To correct this misrepresentation, Harshman and co-workers conducted series of μ+SR experiments on a single-crystal of YBa2Cu3O7–δ, measuring the second moment of the frequency distribution, σ(T0,H), as a function of both temperature and applied field. The strong (and non-monotonic) field dependence exhibited by σ(T→0,H),confirmed the presence of temperature-activated fluxon depinning. By applying a self-consistent analysis approach, and accounting for the effects of fluxon depinning, Harshman and co-workers showed that the underlying gap function of the superconducting hole condensate was nodeless, and best described by the two-fluid model. [Physical Review B 69, 174505 (2004)] [Physical Review B, 72, 146502 (2005)]. In 2011, Harshman and Fiory extended this analysis technique to YBa2Cu4O8 and La2-xSrxCuO4 [Journal of Physics: Condensed Matter 23, 315702 (2011)]. ‡This line of research has proven that the bulk high-TC pairing symmetry of the hole condensate in the cuprates is nodeless, consistent with s-wave and strong coupling, and has shown how fluxon motion can significantly affect the μ+SR data, even for single-crystal YBa2Cu3O7–δ, and how to account for it.
- Oxygen Isotope Effect in High-TC Materials – For high-TC superconductors in which transition temperatures, TC, are reduced by doping, the oxygen isotope effect (OIE) coefficient in TC is shown to increase systematically with the pair-breaking rate and with the valence difference between the substituted and native ions. Moreover, the OIE in TC tends to zero as one approaches optimum (or ideal) stoichiometry at which the quality of the superconducting condensate is maximized. In materials with isovalentsubstitutions, e.g., Sr for Ba or Zn for Cu in YBa2Cu3O7–δ, the small OIE of the parent (unsubstituted) compound is magnified, owing to pair-breaking disorder. In materials with heterovalent substitutions, e.g., La or Pr for Ba, where carrier densities are necessarily changed, pair-breaking induces a much larger OIE. A seminal case is Pr-doped YBa2Cu3O7–δ, where data were previously misinterpreted, owing to the false assumption that Pr substitutes only for Y. It is now clear, however, that the decrease in TC observed with Pr doping actually arises from pair-breaking caused by Pr-on-Ba-site defects introduced during crystal growth. When PrBa2Cu3O7–δ is grown correctly without such defects, TC remains unchanged (as in the case of most other rare earth substitutions for Y). Invariance of TC under a 60% rare-earth mass increase provides strong evidence against phononic pairing mechanisms. The fact that TC drops when Pr substitutes for Ba, but not for Y, indicates that the superconducting hole condensate resides in the BaO layers, where pair-breaking degrades TC and dramatically increases the OIE. Superconductive pairing modeled on Coulomb coupling between the hole (BaO) and the electron (CuO2) layers is shown to resolve the serious shortcomings inherent in approaches based on electron-phonon interactions and is found to be generally applicable. Moreover, the OIE in the magnetic penetration depth in alloys is shown to be constant, with degradation of TC up to 50%, and thus is unrelated to the OIE in TC. [Physical Review B 77, 024523 (2008)] [Physical Review B 80, 136502 (2009)]. ‡This theoretical work corrects several earlier papers on the isotope effect in high-TC compounds, concludes non-phononic mediation and casts the isotope effect into isovalent and heterovalent substitutional categories. Interpretations of differential OIE, combined with specific heat and thermal conductivity data indicate two interacting mobile carrier bands: one of holes and the other, electrons.
- Coexistence of Holes and Electrons in High-TC Compounds – Normal state resistivity and Hall effect are shown to be successfully modeled by a two-band model of holes and electrons that is applied self-consistently to (i) DC transport data reported for eight bulk-crystal and six oriented-film specimens of YBa2Cu3O7–δ, and (ii) far-infrared Hall angle data reported for YBa2Cu3O7–δ and Bi2Sr2CaCu2O8+δ. The electron band exhibits extremely strong scattering; the extrapolated DC residual resistivity of the electronic component is shown to be consistent with the previously observed excess thermal conductivity and excess electrodynamic conductivity at low temperature. Two-band hole-electron analysis of Hall angle data suggest that the electrons possess the greater effective mass. [Philosophical Magazine 91, 818 (2011)] [arXiv]. ‡Theoretical analysis of Hall effect data in high-TC compounds showing the presence of two distinct carrier types of opposite sign. By applying a two-band model to the data from several DC and AC transport measurements, Dr. Harshman and co-workers were able to prove that mobile electrons coexist with the holes in the high-TC compounds. The electrons were found to be heavier that the holes, possess 3D mobility (while the hole were generally confined to two dimensions) and exhibit strong scattering. This discovery suggested that the heavier electrons may play a role in mediating the pairing of lighter holes.
- Theory of High-TC Superconductivity: Transition Temperature – It is demonstrated that the transition temperature (TC) of high-TC superconductors is determined by their layered crystal structure, bond lengths, valency properties of the ions, and Coulomb coupling between electronic bands in adjacent, spatially separated layers. Analysis of 31 high-Tc materials (cuprates, ruthenates, rutheno-cuprates, iron pnictides, organics) yields the universal relationship for optimal compounds, kBTC0 = β/ℓζ, where ℓ is related to the mean spacing between interacting charges in the layers, ζ is the distance between interacting electronic layers, β is a universal constant and TC0 is the optimal transition temperature (determined to within an uncertainty of ± 1.4 K by this relationship). Non-optimum compounds, in which sample degradation is evident, e.g. by broadened superconducting transitions and diminished Meissner fractions, typically exhibit reduced TC < TC0. It is shown that TC0 may be obtained from an average of Coulomb interaction forces between the two layers. [Journal of Physics: Condensed Matter. 23, 295701 (2011)] [arXiv] [Corrigendum: J. Phys.: Condens. Matter 23 349501 (2011)]. Also listed in J. Phys.: Condens. Matter Highlights of 2011. ‡Seminal work on a theoretical model for high-TC pairing based on Coulomb interactions between two nearest-neighbor charge layers. The fact that the universal constant β is equal to about twice the reduced electron Compton wavelength, and the equation for TC0 in independent of band mass, suggests a central role for Compton scatting in high-TC superconductivity, where pairing is accomplished via virtual photons.
- Expansion of the High-TC Interlayer/Interfacial Pairing Theory – Subsequent to the publication of the seminal work in 2011 (above), the interlayer Coulomb pairing model is shown to apply to other superconductor families; iron calcogenides [Journal of Physics: Condensed Matter 24, 135701 (2012)], the intercalated group-4-metal nitride halides [Physical Review B 90, 186501 (2014)] [Journal of Superconductivity and Novel Magnetism 28, 2967 (2015)] and (CaxLa1–x)(Ba1.75–xLa0.25+x)Cu3Oy (i.e., CLBLCO) [Physical Review B 86, 144533 (2012)]. For the charged compensated CLBLCO compound, the first accurate calculation of TC for the related non-optimal materials is provided. Two Tl-based cuprates of the form Tl1–x(Ba/Sr/La)2CaO5–δ [Journal of Physics and Chemistry of Solids 85, 106 (2015)] are also added to the growing list of compounds for which TC is accurately calculated; a derivation of σ is introduced for the optimal Tl2Ba2Caη–1CuηO2η+2 (for η = 1, 2, 3) compounds, which exhibit a Tl oxidation state at or near +3, obtaining the fundamental value σ0 = 0.228 previously established for YBa2Cu3O6.92. Also reported is the marked enhancement in σ associated with Tl+1 and analogous inner-layer cations relative to higher-valence cations. For a model proposition of σ = σ0, the fractional Tl+1 content of the mixed-valence compound, TlBa2Ca2Cu3O9±δ, is predicted to be 1/3 at optimization, in agreement with existing data. Gate-charged twisted bilayer graphene (TBG) has also been shown to be in compliance with the interlayer Coulomb pairing model [Journal of Superconductivity and Novel Magnetism 33, 367 (2020)]. ‡This work has unequivocally established the nature of the high-TC pairing mechanism to be Coulombic, requiring interaction between two physically separated charge reservoirs. The theory is the only published predictive model for TC in the high-TC field.
- Application of Coulomb Interlayer/Interfacial Pairing Theory to 3D Compounds – The applicability of the interfacial Coulombic pairing mechanism has been extended to the 3D macromolecular A3C60 superconducting family of compounds [Journal of Physics: Condensed Matter 29, 145602 (2017)] accurately predicts the optimal transition temperatures in A15 and fcc Cs3C60. Based upon the differing disorder between H3S and D3S [Superconductor Science and Technology 30, 045011 (2017)], the H-D isotope effect exponent is accurately determined in cubic H3S, thereby setting significant limits on the electron-phonon coupling strength and opening the door to unconventional superconductivity. Subsequent application of the Coulomb interfacial mediation model to H3S gives TC0 = 198.5 ± 3.0 K is in excellent agreement with transition temperatures determined from resistivity (196 – 200 K onsets, 190 – 197 K midpoints), susceptibility (200 K onset), and critical magnetic fields (203.5 K by extrapolation). Analysis of mid-infrared reflectivity data also confirms the expected correlation between boson energy and ζ–1 [Journal of Physics: Condensed Matter 29, 445702 (2017)]. The theory is shown to also apply to the hydrogen clathrates; for LaH10, excellent agreement (within <2 K) with experiment is achieved for two optimal samples, with theoretical transition temperatures of 249.8(1.3) K and 260.7(2.0) K [Journal of Superconductivity and Novel Magnetism (2020)]. ‡These results confirm that Coulombic mediation specifically requires physically separated charge reservoirs and is not determined by structural dimensionality.
Journal Publications (chronological order) more
- Surface Interactions of Muonium in Oxide Powders at Low Temperatures, R. F. Kiefl, J. B. Warren, C. J. Oram, G. M. Marshall, J. H. Brewer, D. R. Harshman and C. W. Clawson, Physical Review B 26, 2432 (1982).
- Zero-Field Muon-Spin Relaxation in CuMn Spin-Glasses Compared with Neutron and Susceptibility Measurements, Y. J. Uemura, D. R. Harshman, M. Senba, E. J. Ansaldo and A. P. Murani, Physical Review B 30, 1606 (1984).
- Diffusion and Trapping of Muonium on Silica Surfaces, D. R. Harshman, R. Keitel, M. Senba, R. F. Kiefl, E. J. Ansaldo and J. H. Brewer, Physics. Letters 104A, 472 (1984).
- Study of the Hybrid State of Y9Co7 (2 < T < 6 K) by Means of Zero Field Muon Spin Relaxation, E. J. Ansaldo, D. R. Noakes, J. H. Brewer, R. Keitel, D. R. Harshman, M. Senba, C. Y. Huang and B. V. B. Sarkissian, Solid State Communications 55, 193 (1985); [See also, µSR-Newsletter 30, 1661 (1984)].
- MSR Measurement of the Reaction Rate of Muonium with a Supported Platinum Catalyst, R. F. Marzke, W. S. Glaunsinger, D. R. Harshman, E. J. Ansaldo, R. Keitel, M. Senba, D. R. Noakes, D. P. Spencer and J. H. Brewer, Chemical Physics Letters 120, 6 (1985).
- Longitudinal-Field µ+ Spin Relaxation via Quadrupolar Level-Crossing Resonance in Cu at 20 K, S. R. Kreitzman, J. H. Brewer, D. R. Harshman, R. Keitel, D. Ll. Williams and E. J. Ansaldo, Physical Review Letters 56, 181 (1986); [See also, LF–µSR Quadrupolar Level Crossing Resonance in Copper at 20 K, S. R. Kreitzman, J. H. Brewer, D. R. Harshman, R. Keitel, D. Ll. Williams, K. M. Crowe and E. J. Ansaldo, µSR-Newsletter 30, 1675 (1984)]. ‡The experiments were conducted absent the first author.
- Observation of Muon-Fluorine “Hydrogen Bonding” in Ionic Crystals, J. H. Brewer, S. R. Kreitzman, D. R. Noakes, E. J. Ansaldo, D. R. Harshman and R. Keitel, Physical Review B 33, 7813 (1986); [See also, µSR-Newsletter 31, 1747 (1985)]. ‡This phenomenon was originally discovered by D. R. Harshman and R. Keitel while conducting experiments on muon diffusion in NaF.
- Observation of Low Energy µ+ Emission from Solid Surfaces, D. R. Harshman, J. B. Warren, J. L. Beveridge, K. R. Kendall, R. F. Kiefl, C. J. Oram, A. P. Mills, Jr., W. S. Crane, A. S. Rupaal and J. H. Turner, Physical Review Letters 56, 2850 (1986). ‡This work reported the first production of slow muons from solid surfaces (e.g., LiF) and presented the first published data of the production of Mu– ions in vacuum.
- Electron, Muon and Nuclear Spin Dynamics in SmRh4B4 and ErRh4B4, D. R. Noakes, J. H. Brewer, D. R. Harshman, R. Keitel, E. J. Ansaldo, C. Y. Huang and S. E. Lambert, Physical Review B 35, 6597 (1987).
- Antiferromagnetism and Oxygen Deficiency in Single-Crystal La2CuO4-δ, T. Freltoft, J. E. Fischer, G. Shirane, D. E. Moncton, S. K. Sinha, D. Vaknin, J. P. Remeika, A. S. Cooper and D. R. Harshman, Physical Review B 36, 826 (1987).
- Temperature Dependence of the Magnetic Penetration Depth in the High-TC Superconductor Ba2YCu3O9-δ: Evidence for Conventional S-Wave Pairing, D. R. Harshman, G. Aeppli, E. J. Ansaldo, B. Batlogg, J. H. Brewer, J. F. Carolan, R. J. Cava, M. Celio. A. C. D. Chaklader, W. N. Hardy, S. R. Kreitzman, G. M. Luke, D. R. Noakes and M. Senba, Physical Review B 36, 2386 (1987).
- Generation of Slow Positive Muons from Solid Rare-Gas Moderators, D. R. Harshman, A. P. Mills, Jr., J. L. Beveridge, K. R. Kendall, G. D. Morris, M. Senba, J. B. Warren, A. S. Rupaal and J. H. Turner, Physical Review B 36, 8850 (1987). ‡The slow muon production method pioneered here was adopted by the Paul Scherrer Institut (PSI) for their slow positive muon beam facility.
- Temperature Dependence of the Positron Annihilation Lifetime in Single-Crystal YBa2Cu3O7, D. R. Harshman, L. F. Schneemeyer, J. V. Waszczak, Y. C. Jean, M. J. Fluss, R. H. Howell and A. L. Wachs, Physical Review B 38, 848 (1988).
- Freezing of Spin and Charge in La2-xSrxCuO4, D. R. Harshman, G. Aeppli, G. P. Espinosa, A. S. Cooper, J. P. Remeika, E. J. Ansaldo, T. Riseman, D. Ll. Williams, D. R. Noakes, B. Ellman and T. F. Rosenbaum, Physical Review B 38, 852 (1988).
- Antiferromagnetism and Superconductivity in Oxygen Deficient YBa2Cu3Ox, J. H. Brewer, E. J. Ansaldo, J. Carolan, A. C. D. Chaklader, W. N. Hardy, D. R. Harshman, M. Hayden, M. Ishikawa, N. Kaplan, R. Keitel, J. Kempton, R. F. Kiefl, W. J. Kossler, S. R. Kreitzman, A. Kulpa, Y. Kuno, G. M. Luke, H. Miyatake, K. Nagamine, Y. Nakazawa, N. Nishida, K. Nishiyama, S. Ohkuma, T. M. Riseman, G. Roehmer, P. Schleger, D. Shimada, C. E. Stronach, T. Takabatake, Y. J. Uemura, Y. Watanabe, D. Ll. Williams, T. Yamazaki and B. Yang, Physical Review Letters 60, 1073 (1988).
- Electronic Structure of Studies La2CuO4, A. L. Wachs, P. E. A. Turchi, Y. C. Jean, R. H. Howell, K. H. Wetzler, M. J. Fluss, D. R. Harshman, J. P. Remeika, A. S. Cooper and R. M. Fleming, Physical Review B 38, 913 (1988).
- Polarization and Resonance Properties of Magnetic X-Ray Scattering in Holmium, Doon Gibbs, D. R. Harshman, E. D. Isaacs, D. B. McWhan, D. Mills and C. Vettier, Physical Review Letters 61, 1241 (1988). ‡This paper was the experimental work cited for the 2003 Arthur H. Compton Prize, selectively awarded to its first and fourth authors, along with two theorists not involved with the experiment. In addition to taking part in all of the experiments, Dr. Harshman also designed, commissioned and supervised the building of the novel x-ray spectrometer necessary for its success. During the experiment the acquisition computer failed, and Dr. Harshman volunteered to make the round trip from Cornell to Bell Labs to have it repaired.
- Comment on “Evidence for a Common High-Temperature Superconducting Effect in La1.85Sr0.15CuO4 and YBa2Cu3O7“, D. R. Harshman, L. F. Schneemeyer and J. V. Waszczak, Physical Review Letters 61, 2003 (1988).
- Magnetic Penetration Depth in Single-Crystal YBa2Cu3O7-δ, D. R. Harshman, L. F. Schneemeyer, J. V. Waszczak, G. Aeppli, R. J. Cava, B. Batlogg, L. W. Rupp, Jr., E. J. Ansaldo and D. Ll. Williams, Physical Review B 39, 851 (1989). ‡This paper reported on the first muon spin rotation measurement of the magnetic penetration depth in single-crystal YBa2Cu3O7-δ. The mass anisotropy for YBa2Cu3O7-δ (or any high-TC compound) was measured for the first time using μ+SR.
- Electronic Phase-Purity in La2-xSrxCuO4-δ, D. R. Harshman, G. Aeppli, B. Batlogg, G. P. Espinosa, R. J. Cava, A. S. Cooper, L. W. Rupp, Jr., E. J. Ansaldo, and D. Ll. Williams, Physical Review Letters 63, 1187 (1989).
- Magnetic Penetration Depth in the Organic Superconductor κ-[BEDT-TTF]2Cu[NCS]2, D. R. Harshman, R. N. Kleiman, R. C. Haddon, S. V. Chichester-Hicks, M. L. Kaplan, L. W. Rupp, Jr., D. Ll. Williams and D. B. Mitzi, Physical. Review Letters 64, 1293 (1990).
- Anisotropic Temperature Dependence of the Magnetic Penetration Depth in Superconducting UPt3, C. Broholm, G. Aeppli, R. N. Kleiman, D. R. Harshman, D. J. Bishop, E. Bucher, D. Ll. Williams, E. J. Ansaldo and R. H. Heffner, Physical Review Letters 65, 2062 (1990).
- Polarization and Resonance Studies of X-Ray Magnetic Scattering in Holmium, Doon Gibbs, G. Grubel, D. R. Harshman, E. D. Isaacs, D. B. McWhan, D. Mills and C. Vettier, Physical Review B 43, 5663 (1991).
- Pair Momentum Distribution in Bi2Sr2CaCu2O8+δ Measured by Positron 2D-ACAR: Existence and Nature of the Fermi Surface, L. P. Chan, D. R. Harshman, K. G. Lynn, S. Massidda and D. B. Mitzi, Physical Review Letters 67, 1350 (1991).
- Magnetic Penetration Depth and Flux-Dynamics in Single-Crystal Bi2Sr2CaCu2O8+δ, D. R. Harshman, R. N. Kleiman, M. Inui, G. P. Espinosa, D. B. Mitzi, A. Kapitulnik, T. Pfiz and D. Ll. Williams, Physical Review Letters 67, 3152 (1991).
- Concerning the Nature of High-TC Superconductivity: Survey of Experimental Properties and Implications for Interlayer Coupling, D. R. Harshman and A. P. Mills, Jr., Physical Review B 45, 10684 (1992).
- Longitudinal Correlation Length of Vortices in Anisotropic Superconductors, D. R. Harshman, E. H. Brandt, A. T. Fiory, M. Inui, D. B. Mitzi, L. F. Schneemeyer and J. V. Waszczak, Physical Review B 47, 2905 (1993).
- Muon Spin Relaxation Experiments and Magnetic Flux Lines in the Mixed State High Temperature Superconductors, M. Inui and D. R. Harshman, Physical Review B 47, 12205 (1993).
- Working Group on Condensed Matter Physics, J. Axe, C. Broholm, D. R. Harshman, S. Hayden, H. Mook, S. Nadler, R. Osborn and P. Sokol, in Proceedings of the Workshop on Technology and Scientific Opportunities at a 1 MW Pulsed Spallation Neutron Source, Argonne National Laboratory, Argonne, Illinois, 13 – 16 May 1993 (published in February 1994).
- Magnetic Penetration Depth and Fluxon-Line Dynamics in the Organic Superconductor κ-[BEDT-TTF]2Cu[NCS]2, D. R. Harshman, A. T. Fiory, R. C. Haddon, M. L. Kaplan, T. Pfiz, E. Koster, I. Shinkoda and D. Ll. Williams, Physical Review B 49, 12990 (1994).
- Vacancy Defects in Photoexcited GaAs Studied by Positron Two-Dimensional Angular Correlation of Annihilation Radiation, J. P. Peng, M. T. Umlor, K. G. Lynn, D. J. Keeble and D. R. Harshman, Physical Review B 50, 11247 (1994).
- Two Dimensional Angular Correlation of Annihilation Radiation Study of κ-[BEDT-TTF]2Cu[NCS]2, L. P. Chan, K. G. Lynn, D. R. Harshman and R. C. Haddon, Physical Review B 50, 10393 (1994).
- Study of the SiO2/Si Interface Using Variable Energy Positron Two-Dimensional Angular Correlation of Annihilation Radiation, J. P. Peng, K. G. Lynn, P. Asoka-Kumar, D. P. Becker and D. R. Harshman, Physical Review Letters 76, 2157 (1996).
- Vortex Lattice Disorder in Untwinned Single Crystal YBa2Cu3O7-δ, W. J. Kossler, A. D. de Goonewardene, A. J. Greer, D. Ll. Williams, E. Koster, D. R. Harshman, J. Z. Liu and R. N. Shelton, Physical Review B 56, 2376 (1997).
- Transparency of the ab Planes of Bi2Sr2CaCu2Ox to Magnetic Fields, W. J. Kossler, Y. Dai, K. G. Petzinger, A. J. Greer, D. Ll. Williams, E. Koster, D. R. Harshman and D. B. Mitzi, Physical Review Letters 80, 592 (1998).
- Magnetism and Superconductivity in Sr2YRu1-uCuuO6 and Magnetism in Ba2GdRu1-uCuuO6, H. A. Blackstead, J. D. Dow, D. R. Harshman, M. J. DeMarco, M. K. Wu, D. Y. Chen, F. Z. Chien, D. B. Pulling, W. J. Kossler, A. J. Greer, C. E. Stronach, E. Koster and B. Hitti, European Physical Journal B 15, 649 (2000).
- Magnetically Ordered Cu and Ru in Ba2GdRu1-uCuuO6 and in Sr2YRu1-uCuuO6, H. A. Blackstead, J. D. Dow, D. R. Harshman, W. B. Yelon, M. X. Chen, M. K. Wu, D. Y. Chen, F. Z. Chien and D. B. Pulling, Physical Review B 63, 214412 (2001).
- Magnetic Susceptibility and Resonance Studies of Ordering in Ba2GdRu1-uCuuO6, H. A. Blackstead, J. D. Dow, D. R. Harshman, D. B. Pulling, M. K. Wu, D. Y. Chen and F. Z. Chien, Solid State Communications 118, 355 (2001).
- Spin-Glass Behavior, Spin Fluctuations and Superconductivity in Sr2Y(Ru1-uCuu)O6, D.. R. Harshman, W. J. Kossler, A. J. Greer, D. R. Noakes, C. E. Stronach, E. Koster, M. K. Wu, F. Z. Chien, J. P. Franck, I. Isaac and J. D. Dow, Physical Review B 67, 054509 (2003).
- Muon Spin Rotation in GdSr2Cu2RuO8: Implications, D. R. Harshman, J. D. Dow, W. J. Kossler, D. R. Noakes, C. E. Stronach, A. J. Greer, E. Koster, Z. F. Ren and D. Z. Wang, Philosophical Magazine 83, 3055 (2003).
- Muon Spin Rotation Study of the (TMTSF)2ClO4 System, A. J. Greer, D. R. Harshman, W. J. Kossler, A. Goonewardene, D. Ll. Williams, E. Koster, W. Kang, R. N. Kleiman and R. C. Haddon, Physica C 400 (issues 1-2), 59 (2003).
- Nodeless Pairing-State Gap Function in Single-Crystal YBa2Cu3O7, D. R. Harshman, W. J. Kossler, X. Wan, A. T. Fiory, A. J. Greer, D. R. Noakes, C. E. Stronach, E. Koster, and J. D. Dow, Physical Review B 69, 174505 (2004). ‡Experiment confirming the nodeless character of the bulk high-TC hole condensate.
- Reply to “Comment on ‘Nodeless Pairing State in Single-Crystal YBa2Cu3O7‘”, D. R. Harshman, W. J. Kossler, X. Wan, Anthony T. Fiory, A. J. Greer, D. R. Noakes, C. E. Stronach, E. Koster and J. D. Dow, Physical Review B, 72, 146502 (2005).
- Isotope Effect in High-TC Superconductors, D. R. Harshman, J. D. Dow and A. T. Fiory, Physical Review B 77, 024523 (2008). ‡Theoretical work correcting several earlier papers on the isotope effect in high-TC compounds, concluding non-phononic mediation and casting the isotope effect into isovalent and heterovalent substitutional categories. Interpretations of differential OIE, combined with specific heat and and thermal conductivity data indicate two interacting mobile carrier bands: one of holes and the other, electrons.
- Coexisting Holes and Electrons in High-TC Materials: Implications from normal state transport, D. R. Harshman, J. D. Dow and A. T. Fiory, Philosophical Magazine 91, 818 (2011). ‡Theoretical analysis of Hall effect data in high-TC compounds showing the presence of two distinct carrier types of opposite sign. By applying a two-band model to the data from several DC and AC transport measurements, it was conclusively shown that mobile electrons coexist with the holes in the high-TC compounds. The electrons were found to be heavier that the holes, possess 3D mobility (while the hole were generally confined to two dimensions) and exhibit strong scattering. This discovery suggested that the heavier electrons likely play a role in mediating the pairing of lighter holes.
- Theory of High-TC Superconductivity: Transition Temperature, D. R. Harshman, A. T. Fiory and J. D. Dow, Journal of Physics: Condensed Matter 23, 295701 (2011); News Article; Corrigendum:Journal of Physics: Condensed Matter 23, 349501 (2011). Also listed in J. Phys.: Condens. Matter Highlights of 2011. ‡Seminal work on a theoretical model for high-TC pairing based on Coulomb interactions between two nearest-neighbor charge layers. The fact that the universal constant β is equal to about twice the reduced electron Compton wavelength, and the equation for TC0 in independent of band mass, suggests a central role for Compton scatting in high-TC superconductivity, where pairing is accomplished via virtual photons.
- Concerning the Superconducting Gap Symmetry in YBa2Cu3O7–δ, YBa2Cu4O8, and La2-xSrxCuO4 Determined from Muon Spin Rotation in Mixed States of Crystals and Powders, D. R. Harshman and A. T. Fiory, Journal of Physics: Condensed Matter 23, 315702 (2011). ‡Theoretical treatment of μ+SR data showing that for studies of the mixed state, there is clear evidence supporting a nodeless gap function, consistent with strong-coupled s-wave pairing. These results are compared to results obtained using other other experimental techniques, both static and dynamic, in the mixed and Meissner states. These results corrected the misrepresentation regarding the pairing state symmetry in the cuprate superconductors.
- The Superconducting Transition Temperatures of Fe1+xSe1–y, Fe1+xSe1–yTeyand (K/Rb/Cs)zFe2–xSe2, D. R. Harshman and A. T. Fiory, Journal of Physics: Condensed Matter 24, 135701 (2012). ‡Theoretical treatment showing that the Se-based iron chalcogenide superconductors are high-TC in nature, whose optimal transition temperatures TC0 are given by our interlayer Coulombic-coupling mechanism; thus increasing to 36 known compliant compounds from six different superconducting families.
- Charge Compensation and Optimal Stoichiometry in (CaxLa1–x)(Ba1.75–xLa0.25+x)Cu3Oy, D. R. Harshman and A. T. Fiory, Physical Review B 86, 144533 (2012). ‡Theoretical consideration of the title compound (abbreviated CLBLCO) showing the following: (1) Superconducting CLBLCO has only one optimal stoichiometry, and resolves the conflicting experimental interpretations on CLBLCO; (2) TC is non-proportional to n/m*; (3) By scaling the Ba-ion content with respect to YBa2Cu3O6.92, TC0 is calculated to within a few K of experiment; (4) X-ray absorption results place most of the superconducting condensate outside the cuprate planes; chemical strain considered by the discovering group is shown to be a minor perturbation; and (5) Explains that superconductivity in CLBLCO is nonsymbiotic with magnetic phenomena observed in non-superconducting underdoped compositions.
- Comment on “Superconductivity in Electron-Doped Layered TiNCl with Variable Interlayer Coupling”, D. R. Harshman and A. T. Fiory, Physical Review B 90, 186501 (2014). ‡The interlayer Coulombic pairing model is shown to apply to the intercalated/co-intercalated TiNCl compounds, which exhibit remote Coulomb scattering (RCS). The mediating interaction occurs between the Cl anion (superconducting) layer and the cations of the intercalation (mediating) layer. Optimization is shown to occur with decreasing RCS pair breaking, i.e., as the distance between the two interacting layers is increased above ~7 Å.
- High-TC Superconductivity in Cs3C60 Compounds Governed by Local Cs-C60 Coulomb Interactions, D. R. Harshman and A. T. Fiory, Journal of Physics: Condensed Matter 29, 145602 (2017). ‡This study accurately predicts the optimal transition temperatures in A15 and fcc Cs3C60 and represents the successful application of the Coulombic (interlayer/interfacial) pairing theory to a three-dimensional system.
- On the Isotope Effect in Compressed H3S and D3S, D. R. Harshman and A. T. Fiory, Superconductor Science and Technology 30, 045011 (2017). ‡The H-D isotope effect exponent is accurately determined in H3S based upon the differing disorder between H3S and D3S, thereby setting significant limits on the electron-phonon coupling strength.
- Compressed H3S: Inter-Sublattice Coulomb Coupling in a High-TC Superconductor, D. R. Harshman and A. T. Fiory, Journal of Physics: Condensed Matter 29, 445702 (2017). ‡Our findings regarding the true magnitude of the H-D isotope effect exponent suggests that the superconductivity in H3S is non-phononic in origin. This work represents the first application of the Coulomb Interfacial pairing model to a structurally 3D covalently-bonded compound.
- High-TC Superconductivity Originating from Interlayer Coulomb Coupling in Gate-Charged Twisted Bilayer Graphene Moiré Superlattices, D. R. Harshman and A. T. Fiory, Journal of Superconductivity and Novel Magnetism 33, 367 (2020). ‡Given the presence of interlayer excitons, binary Twisted Bilayer Graphene (TBG) devices have proven to be an ideal test case for our Interlayer Coulomb Pairing Model.
- High-TC Superconductivity in Hydrogen Clathrates Mediated by Coulomb Interactions between Hydrogen and Central-Atom Electrons, D. R. Harshman and A. T. Fiory, Journal of Superconductivity and Novel Magnetism 33, 2945 (2020). ‡These results successfully extend the interlayer/inter-reservoir Coulomb interaction pairing model to binary hydrogen clathrate systems.
Conference Publications more
- Muonium in Al2O3 Powder at Low Temperatures, R. F. Kiefl, J. B. Warren, C. J. Oram, J. H. Brewer and D. R. Harshman, in Positron Annihilation, edited by P. G. Coleman, S. C. Sharma and L. M. Diana, p. 693 (North-Holland Publishing Company, 1983).
- Magnetic Susceptibility, Proton NMR and Muon Spin Rotation (µSR) Studies of an Unsupported Platinum Catalyst with Adsorbed H and O, R. F. Marzke, W. S. Glaunsinger, K. B. Rawlings, P. Van Rheenen, M. McKelvy, J. H. Brewer, D. R. Harshmanand R. F. Kiefl, in Electronic Structure and Properties of Hydrogen in Metals, edited by P. Jena and C. B. Satterthwaite (Plenum Publishing Corporation, 1983).
- Zero-Field µSR in a Spin Glass CuMn (1.1 at. %): Precise Measurement of Static and Dynamic Effects Below Tg, Y. J. Uemura, T. Yamazaki, D. R. Harshman, M. Senba, J. H. Brewer, E. J. Ansaldo and R. Keitel, Hyperfine Interactions 17-19, 453 (1984).
- µ+SR Study of Some Magnetic Superconductors, C. Y. Huang, E. J. Ansaldo, J. H. Brewer, D. R. Harshman, K. M, Crowe, S. S. Rosenblum, C. W. Clawson, Z. Fisk, S. Lambert, M. S. Torikachvili and M. B. Maple, Hyperfine Interactions 17-19, 509 (1984).
- Positive Muons in Antimony Bismuth Alloys, F. N. Gygax, A. Hintermann, A. Schenck, W. Studer, A. J. van der Wal, J. H. Brewer, D. R. Harshman, E. Koster, H. Schilling, D. Ll. Williams and M. G. Priestly, Hyperfine Interactions 17-19, 387 (1984).
- Production of Muonium in Vacuum from Silica Powders, G. M. Marshall, G. A. Beer, T. Bowen, Z. Gelbart, P. G. Halverson, D. R. Harshman, K. R. Kendall, A. R Kunselman, G. R. Mason, A. Olin and J. B. Warren, in Proceedings of the Los Alamos Workshop on Fundamental Muon Physics: Atoms, Nuclei and Particles, Los Alamos, New Mexico, USA, 20 – 22 January 1986.
- The Relaxation Rate of Muonium as a Function of Temperature and Loading in Silica-supported Platinum Catalysts, R. F. Marzke, D. R. Harshman, E. J. Ansaldo, R. Keitel, M. Senba, D. R. Noakes and J. H. Brewer, Ultramicroscopy 20, 161 (1986).
- Muonium in Bulk Fused Quartz: Test Case for RAHD Relaxation Theory, D. R. Harshman, R. E. Turner, J. H. Brewer and D. P. Spencer, in Proceedings of the µSR-86 Conference, Uppsala, Sweden, 23 – 27 June 1986, Hyperfine Interactions 32, 527 (1986).
- Positive Muons in Single Crystal Sodium Fluoride: A Simple Spin System, D. R. Harshman and M. Celio, in Proceedings of the µSR-86 Conference, Uppsala, Sweden, 23 – 27 June 1986, Hyperfine Interactions 32, 683 (1986).
- Observation of Muon Level-Crossing Resonance in Antiferromagnetic MnF2, G. M. Luke, R. F. Kiefl, S. R. Kreitzman, J. H. Brewer, R. Keitel, D. R. Noakes, Y. J. Uemura, D. R. Harshman and V. Jaccarino, in Proceedings of µSR-86 Conference, Uppsala, Sweden, 23 – 27 June 1986, Hyperfine Interactions 31, 29 (1986).
- Determination of Very Slow µ+ Hop Rates in Cu by LF-µSR, J. H. Brewer, M. Celio, D. R. Harshman, R. Keitel, S. R. Kreitzman, G. M. Luke, D. R. Noakes, R. E. Turner, E. J. Ansaldo, C. W. Clawson, K. M. Crowe, S. Kohn, S. R. Rosenblum, J. Smith and C. Y. Huang, in Proceedings of the μSR-86 Conference, Uppsala, Sweden, 23 – 27 June 1986, Hyperfine Interactions 31, 191 (1986).
- µSR Studies on Pure MnF2 and Site-Diluted (Mn0.5Zn0.5)F2, Y. J. Uemura, R. Keitel, M. Senba, R. F. Kiefl, S. R. Kreitzman, D. R. Noakes, J. H. Brewer, D. R. Harshman, E. J. Ansaldo, K. M. Crowe and V. Jaccarino, inProceedings of the µSR-86 Conference, Uppsala, Sweden, 23 – 27 June 1986, Hyperfine Interactions 31, 313 (1986).
- µ+ Knight Shifts and Trapping in Dilute SbSn Alloys, J. H. Brewer, D. R. Harshman, E. Koster, S. R. Kreitzman, D. R. Noakes, M. Senba and D. Ll. Williams, in Proceedings of the µSR-86 Conference, Uppsala, Sweden, 23 – 27 June 1986, Hyperfine Interactions 31, 433 (1986).
- Thermal Hopping of µ+ Between “FµF” Centres in NaF, J. H. Brewer, D. R. Harshman, R. Keitel, S. R. Kreitzman, G. M. Luke, D. R. Noakes, R. E. Turner and E. J. Ansaldo, in Proceedings of the µSR-86 Conference, Uppsala, Sweden, 23 – 27 June 1986, Hyperfine Interactions 32, 677 (1986).
- Muonium Reaction with Ethylene on Powder Surfaces, R. Keitel, M. Senba and D. R. Harshman, in Proceedings of the µSR-86 Conference, Uppsala, Sweden, 23 – 27 June 1986, Hyperfine Interactions 32, 865 (1986).
- Slow Muon Physics, D. R. Harshman, Invited Paper, in Proceedings of the NATO Advanced Research Workshop on Atomic Physics with Positrons, London, United Kingdom, 15 – 18 July 1987.
- Magnetic Correlations in La2NiO4+δ and La2-xSrxCuO4, G. Aeppli, D. R. Harshman, D. Buttrey, E. J. Ansaldo, G. P. Espinosa, A. S. Cooper, J. P. Remeika, T. Freltoft, T. M. Riseman, D. R. Noakes, B. Ellman, T. F. Rosenbaum and D. Ll. Williams, Physica C 153-155, 1111 (1988).
- Temperature Dependence of the Magnetic Penetration Depth in YBa2Cu3O7 Measured by Muon Spin Rotation, R. F. Kiefl, T. M. Riseman, G. Aeppli, E. J. Ansaldo, J. F. Carolan, R. J. Cava, W. N. Hardy, D. R. Harshman, N. Kaplan, J. R. Kempton, S. R. Kreitzman, G. M. Luke, B. X. Yang, D. Ll. Williams, Physica C 153-155, 757 (1988).
- Electronic Structure Investigations of High-TC Materials by Positron Annihilation Spectroscopy: Theory and Experiment, A. L. Wachs, P. E. A. Turchi, Y. C. Jean, K. H. Wetzler, R. H. Howell, D. R. Harshman, J. P. Remeika, A. S. Cooper, R. M. Fleming and M. J. Fluss, in Proceedings of the MRS Meeting, Reno, Nevada, USA, 5 – 8 April 1988.
- Polarization Analysis of X-Ray Magnetic Scattering, Doon Gibbs, M. Blume, D. R. Harshman and D. B. McWhan, Invited Paper, in Proceedings of the Third International Conference on Synchrotron Radiation Instrumentation, Tsukuba, Japan, 4 September 1988, Reviews of Scientific Instruments 60, 1655 (1989).
- Magnetic Penetration Depth of Bi-Sr-Ca-Cu-O, E. J. Ansaldo, B. Batlogg, R. J. Cava, D. R. Harshman, L. W. Rupp, Jr., T. M. Riseman and D. Ll. Williams, Physica C 162-164, 259 (1989).
- Superconductivity of UPt3 Studied by µ+SR and Neutron Scattering, C. Broholm, R. N. Kleiman, G. Aeppli, D. R. Harshman, D. J. Bishop, E. Bucher, D. Ll. Williams, R. H. Heffner, and E. J. Ansaldo, in Proceedings of MMM Conference, San Diego, California, USA, 29 Oct. – 1 Nov. 1990, Journal of Applied Physics 69, 5491 (1991).
- Application of Muon Spin Relaxation Experiment to the Mixed-State Superconductors, M. Inui and D. R. Harshman, in Proceedings of the Conference on Physical Phenomena at High Magnetic Fields, Tallahassee, Florida, USA, 15 – 18 May 1991.
- Application of Muon Spin Relaxation Experiment to the Vortex Dynamics of High-TC Superconductors, M. Inui and D. R. Harshman, in Proceedings of the Int’l. Conf. of the Materials and Mechanisms of Superconductivity – High Temperature Superconductors III, Kanazawa, Japan, 22 – 26 July 1991.
- Muon Spin Relaxation Studies of the Layered Copper Oxides, G. Aeppli and D. R. Harshman, in Proceedings of the Univ. of Miami Workshop on: Electronic Structure and Mechanisms for High Temperature Superconductivity, Miami, Florida, USA, 3 – 9 January 1991.
- Evidence for a Fermi Surface in Bi2Sr2CaCu2O8+δ Measured by Positron 2D-ACAR, L. P. Chan, D. R. Harshman, K. G. Lynn, S. Massidda and D. B. Mitzi, Invited Paper, in Proceedings of the Conference on the Fermiology of High-TC Superconductors, Argonne National Laboratory, Argonne, Illinois, 25-27 March 1991, Journal of Physics and Chemistry of Solids 52, 1557 (1991).
- Slow Muon Physics: Applications to Problems in Superconductivity, D. R. Harshman, Invited Paper, in Proceedings of the International Workshop on Low Energy Muon Science (LEMS’93), Sante Fe, New Mexico, USA, 4 – 8 April 1993, M. Leon, Ed.
- High-TC Superconductivity: Applications of µ+SR and Slow µ+ Beams, D. R. Harshman, Invited Paper, in Proceedings of the International School of Physics, Enrico Fermi Course on Positron Spectroscopy of Solids, Varenna, Italy, 6 – 16 July 1993.
- Muon Spin Rotation in Sr2YRu1-uCuuO6, D. R. Harshman, H. A. Blackstead, W. J. Kossler, A. J. Greer, C. E. Stronach, E. Koster, B. Hitti, M. K. Wu, D. Y. Chen, F. Z. Chien and J. D. Dow, Invited Paper, in Proceedings of the Second Annual Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials (New3SC-2), Las Vegas, Nevada, USA, 31 May – 3 June 1999, International Journal of Modern Physics B 13, 3670 (1999).
- Location of the Superconducting Hole Condensate in Sr2YRu1-uCuuO6, D. R. Harshman, W. J. Kossler, A. J. Greer, C. E. Stronach, E. Koster, B. Hitti, M. K. Wu, D. Y. Chen, F. Z. Chien, H. A. Blackstead and J. D. Dow, in Proceedings of the 8th International Conference on Muon Spin Rotation, Relaxation and Resonance (µSR-99), Les Diablerets, Switzerland, 30 August – 3 September 1999, Physica B 289-290, 360 (2000).
- Location and Properties of the Superconducting Hole-Condensate in Sr2YRu1-uCuuO6, H. A. Blackstead, J. D. Dow, D. R. Harshman, D. B. Pulling, W. J. Kossler, A. J. Greer, C. E. Stronach, E. Koster, B. Hitti, M. K. Wu, D. Y. Chen and F. Z. Chien, in Proceedings of the 6th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-VI), Houston, Texas, 20-25 February 2000, Physica C 341-348 (1-4), 163-164 (2000).
- Eu2-zCezSr2Cu2RuO10 Superconducts in its SrO layers, not in the Cuprate Planes, H. A. Blackstead, J. D. Dow, D. R. Harshman, I. Felner, D. B. Pulling, W. J. Kossler, A. J. Greer, C. E. Stronach, E. Koster and B. Hitti, in Proceedings of the 6th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-VI), Houston, Texas, 20-25 February 2000, Physica C 341-348, 165-166 (2000).
- Magnetic Resonance and Surface Resistance of Ba2GdRu1-uCuuO6, H. A. Blackstead, J. D. Dow, D. R. Harshman, D. B. Pulling, M. K. Wu, D. Y. Chen and F. Z. Chien, in Proceedings of the 6th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-VI), Houston, Texas, 20-25 February 2000, Physica C 341-348 (1-4), 571-572 (2000).
- High-Temperature Superconductivity is Charge-Reservoir Superconductivity, J. D. Dow, H. A. Blackstead and D. R. Harshman, Invited Paper, in Proceedings of the Conference on Phase Transitions and Self-Organization in Electronic and Molecular Networks, Cambridge University, United Kingdom, 11-14 July 2000, to be published in Phase Transitions and Self-Organization in Electronic and Molecular Networks, edited by J. C. Phillips and M. F. Thorpe, (Kluwer-Plenum, 2001), pp 403-412.
- The Case Against Cuprate-Plane Superconductivity, J. D. Dow, H. A. Blackstead and D. R. Harshman, Invited Paper, in Proceedings of the 3rd International Conference on Stripes and High-TC Superconductivity (STRIPES 2000), Rome, Italy, 24-30 September 2000, Edited by A. Bianconi, International Journal of Modern Physics B 14, 3444 (2000).
- Superconductivity and Magnetism in Sr2YRu1-uCuuO6 and Ba2GdRu1-uCuuO6, D. R. Harshman, W. J. Kossler, A. J. Greer, C. E. Stronach, D. R. Noakes, E. Koster, M. K. Wu, F. Z. Chien, H. A. Blackstead, D. B. Pulling and J. D. Dow, Invited Paper, in Proceedings of the Third International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-3), Honolulu, Hawaii, USA, 15-19 January 2001, Physica C 364-365, 392 (2001).
- High-Temperature Superconductivity: the role of oxide layers, J. D. Dow, H. A. Blackstead and D. R. Harshman, Invited Paper, in Proceedings of the Third International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-3), Honolulu, Hawaii, USA, 15-19 January 2001, Physica C 364-365, 74 (2001).
- Magnetic Resonance and Mossbauer Studies of GdSr2Cu2RuO8, H. A. Blackstead, J. D. Dow, D. R. Harshman and D. B. Pulling, Invited Paper, in Proceedings of the Third International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-3), Honolulu, Hawaii, USA, 15-19 January 2001, Physica C 364-365, 305 (2001).
- Origin of High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, in Proceedings of the Conference on Strongly Correlated Electron Systems (SCES 2001), Ann Arbor, Michigan, USA, 6-10 August 2001, Physica B 312-313, 53 (2002).
- Ruthenate and Cuprate High-TC Superconductivity, J. D. Dow and D. R. Harshman, in Proceedings of the International Conference on Superconductivity, CRM and Related Materials: Novel Trends (SCRM 2002), Giens, France, 1-8 June 2002, Journal of Superconductivity 15, 455 (2002).
- Proofs that High-Temperature Superconductivity is in BaO, SrO or Interstitial-Oxygen Layers, and is S-Wave Paired and P-Type, J. D. Dow and D. R. Harshman, in Proceedings of the 10th international Ceramics Congress and 3rd Forum on New Materials (CIMTEC 2002), Florence, Italy 14-18 July 2002, edited by P. Vincenzini (Techna Publishers, S.Rr.L., Faenza, Italy).
- High-Temperature Superconductivity: The hole-pairing is s-wave and the holes are on the SrO, BaO or interstitial oxygen, J. D. Dow and D. R. Harshman, in Proceedings of the 2002 International Conference on the Physics and Chemistry of Molecular and Oxide Superconductors (MOS 2002), Hsinchu, Taiwan, 13-18 August 2002, Journal of Low Temperature Physics 131, 483 (2003).
- SrO and BaO High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, in Proceedings of the 23rd International Conference on Low Temperature Physics (LT23), Hiroshima, Japan, 20-27 August 2002, Physica C 388-389, 447 (2003).
- Locus of High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, Invited Paper, in Proceedings of the Fourth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-4), San Diego, California, 16-21 January 2003, International Journal of Modern Physics B 17, 3310 (2003).
- Verification of Nodeless Superconductivity Pairing in Single-Crystal YBa2Cu3O7, D. R. Harshman, W. J. Kossler, X. Wan, A. T. Fiory, A. J. Greer, D. R. Noakes, C. E. Stronach, E. Koster, A. Erb and J. D. Dow, Invited Paper, in Proceedings of the Fourth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-4), San Diego, California, 16-21 January 2003, International Journal of Modern Physics B 17, 3582 (2003).
- High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, Invited Paper, in Proceedings of the International Workshop on Unconventional Superconductors (U-Super), Campinas, Brazil, 20-24 May 2003 Brazilian Journal of Physics 33, 681 (2003).
- Non-Cuprate-Planar Superconductivity, J. D. Dow and D. R. Harshman, in Proceedings of the International Conference on Dynamic Inhomogeneities in Complex Oxides, Bled, Slovinia, 14-20 June 2003 Journal of Superconductivity 17, 179 (2004).
- YBa2Cu3O7 is an S-Wave Superconductor, D. R. Harshman and J. D. Dow, in Proceedings of the 7th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-RIO), Rio de Janeiro, Brazil, 25-30 May 2003, Physica C 408-410, 361 (2004).
- Nodeless Pairing State Symmetry in YBa2Cu3O7, D. R. Harshman, J. D. Dow, W. J. Kossler, A. T. Fiory, A. J. Greer, D. R. Noakes, C. E. Stronach and E. Koster, Invited Paper, Symposium on Emerging Mechanisms for High Temperature Superconductivity (SEMHTS), Miami, Florida, 11-16 January 2004. New Challenges in Superconductivity: Experimental Advances and Emerging Theories, NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 183, Edited by J. Ashkenazi, M. V. Erimin, J. L. Cohn, I. Eremin, D. Manske, D. Pavuna and F. Zuo, p. 129 (Springer, Berlin, New York, 2005).
- High-Temperature Superconductivity of Oxides, J. D. Dow and D. R. Harshman, Invited Paper, Symposium on Emerging Mechanisms for High Temperature Superconductivity (SEMHTS), Miami, Florida, 11-16 January 2004. New Challenges in Superconductivity: Experimental Advances and Emerging Theories, NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 183, Edited by J. Ashkenazi, M. V. Erimin, J. L. Cohn, I. Eremin, D. Manske, D. Pavuna and F. Zuo, p. 49 (Springer, Berlin, New York, 2005).
- Fluxon Pinning in the Nodeless Pairing State of Superconducting YBa2Cu3O7, A. T. Fiory, D. R. Harshman, J. Jung, I.-Y. Isaac, W. J. Kossler, X. Wan, A. J. Greer, D. R. Noakes, C. E. Stronach, E. Koster and J. D. Dow, Invited Paper, in Proceedings of the 133rd Annual Meeting of the Minerals, Metals, Materials Society (TMS), Charlotte, North Carolina, 14-18 March 2004, Journal of Electronic Materials, Journal of Electronic Materials 34, 474 (2005).
- The Discrepancy Between Muon Spectroscopy and Scanning Tunneling Microscopy and Photoemission: YBa2Cu3O7 and Bi2Sr2CaCu2O8, J. D. Dow and D. R. Harshman, Invited Paper, in Proceedings of the Fifth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-5), Chongqing, China, 10-15 June 2004, International Journal of Modern Physics B 19, 37 (2005).
- Thermal Conductivity of YBa2Cu3O7: s-wave interpretation, D. R. Harshman and J. D. Dow, Invited Paper, in Proceedings of the Fifth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-5), Chongqing, China, 10-15 June 2004, International Journal of Modern Physics B 19, 147 (2005).
- The True Nature of High Temperature Superconductivity, J. D. Dow, D. R. Harshman and A. T. Fiory, 24th International Conference on Low Temperature Physics, Orlando, Florida, 10 – 17 August 2005, AIP Conference Proceedings 850, 555 (2006).
- Nature of High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, Invited Paper, in Proceedings of the 33rd Conference on the Physics and Chemistry of Semiconducting Interfaces (PCSI-33), Cocoa Beach, Florida 15-19 January (2006), Journal of Vacuum Science and Technology B 24, 1977 (2006).
- High-TC Superconductivity in Cuprates and Ruthenates, J. D. Dow, D. R. Harshman and Anthony T. Fiory, Invited Paper, in Proceedings of Conference on Electron Correlation in New Materials and Nanosystems, NATO Advanced Research Workshop, Yalta, Crimea, Ukraine, 19-23 Sept. 2005, NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 241: Electron Correlation in New Materials and Nanosystems, edited by .Kurt Scharnberg and Sergi Kruchinin (Springer, 2007).
- Alkaline-Earth Layer High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, in Proceedings of the 8th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-VIII), Dresden, Germany 9-14 July 2006, Physica C 460-462, 499 (2007).
- BaO Planes, Not CuO2 Planes, Contain High-TC Superconductivity, J. D. Dow and D. R. Harshman, Invited Paper, in Proceedings of the Sixth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-6), Sidney, Australia, 9-11 January 2007, International Journal of Modern Physics B 21, 3086 (2007).
- Elements of Modern High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, in Proceedings of NATO Advanced Research Workshop, Electron Transport in Nanosystems (ETN-2007 ), Yalta, Ukraine, 17-21 September 2007, NATO Science for Peace and Security Series B: Physics and Biophysics, Electron Transport in Nanosystems, edited by J. Bonca and S. K. Krunchinin (Springer, The Netherlands, 2008).
- Symmetry of Superconductivity in YBa2Cu3O7: s or d, J. D. Dow, D. R. Harshman and A. T. Fiory, Invited Paper, in Proceedings of Seventh International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-7), Beijing, China, 13-16 May 2009, Journal of Superconductivity and Novel Magnetism 23, 641 (2010).
- Effects of Vortex Pinning on the Temperature Dependence of the Magnetic Field Distributions in Superconductors, W. J. Kossler, A. J. Greer, D. R. Harshman, C. E. Stronach, A. C. Shockley and M. Shinn, in Proceedings of the 12th International Conference on Muon Spin Rotation and Resonance (μSR2011), Cancun, Mexico, 16-20 May 2011, Physics Procedia 30, 245 (2012).
Invited Talks more
- Muonium on Silica Surfaces, D. R. Harshman, Invited Talk, µSR Journal Seminar, Department of Physics, University of California at Berkeley, Berkeley, California, USA, 16 February 1983.
- Behavior of Muonium on SiO2 Surfaces, D. R. Harshman, Invited Talk, Solid State Seminar Series, Department of Physics, The University of British Columbia, Vancouver, B.C., Canada, 28 February 1985.
- Muonium on Silica Surfaces, D. R. Harshman, Invited Talk, AT&T Bell Laboratories, Murray Hill, New Jersey, USA, 4 April 1985.
- The Interaction of Muonium with Silica Surfaces, D. R. Harshman, Invited Talk, Physics and Astronomy Seminar Series, Department of Physics, Western Washington University, Bellingham, Washington, USA, 15 May 1985.
- Muonium on Surfaces, D. R. Harshman, Invited Talk, European Workshop on the Spectroscopy of Sub-Atomic Species in Non-Metallic Solids, Vitry-sur-Seine, France, 3 – 7 September 1985.
- The Interactions of Muonium with Surfaces, D. R. Harshman, Invited Talk, Lawrence Livermore National Laboratory, Livermore, California, USA, 21 October 1985.
- Ultra-Slow Muon Production, D. R. Harshman, Invited Talk, Workshop on New Methods and Applications of µSR, The University of British Columbia, Vancouver, B.C., Canada, 21-23 August 1985.
- Muon/Muonium Surface Interactions, D. R. Harshman, Invited Talk, µSR-86 Conference, Uppsala, Sweden, 23-27 June 1986 [Cross Ref: Paper].
- Slow Muon Physics, D. R. Harshman, Invited Talk, NATO Advanced Research Workshop on Atomic Physics with Positrons, London, England 15 – 18 July 1987 [Cross Ref: Paper].
- µ+SR and Positron Annihilation Spectroscopy in YBa2Cu3O7-d and La2-xSrxCuO4, D. R. Harshman, Invited Talk, Department of Physics, University of Maryland, College Park, Maryland, USA, 7 March 1988.
- µ+SR and Positron Annihilation Spectroscopy in YBa2Cu3O7-d and La2-xSrxCuO4, D. R. Harshman, Invited Talk, AT&T Bell Laboratories, Murray Hill, New Jersey, USA, 11 March 1988.
- Spin Dynamics and Superconductivity in Cu-Oxides, D. R. Harshman, Invited Talk, APS Meeting, St. Louis, Missouri, USA, 20 – 24 March 1989.
- Polarization and Resonance in Magnetic X-Ray Scattering, E. D. Isaacs, D. R. Harshman, D. B. McWhan, L. D. Gibbs, D. Mills and C. Vettier, Invited Talk, Department of Physics, Cornell University, Ithaca, New York, USA, 14 June 1988.
- Polarization Analysis of X-Ray Magnetic Scattering, Doon Gibbs, M. Blume, D. R. Harshman and D. B. McWhan, Invited Talk, Third International Conference on Synchrotron Radiation Instrumentation, Tsukuba, Japan, 4 September 1988 [Cross Ref: Paper].
- Magnetic Penetration Depth, Flux Motion, and Disorder in the High-TC Cuprates, D. R. Harshman, Invited Talk, Department of Applied Physics, Stanford University, Stanford, California, USA, 7 December 1989.
- Evidence for a Fermi Surface in Bi2Sr2CaCu2O8+δ Measured by 2D-ACAR, L. P. Chan, D. R. Harshman, K. G. Lynn, S. Massidda and D. B. Mitzi, Invited Talk, Conference on the Fermiology of High-TC Superconductors, Argonne National Laboratory, Argonne, Illinois, USA, 25 – 27 March 1991 [Cross Ref: Paper].
- New Physics with the Muon and Positron Facilities Proposed at CEBAF, D. R. Harshman and A. P. Mills, Jr., Invited Talk, CEBAF, Newport-News, Virginia, USA, 2 July 1991.
- The Penetration Depth and Pairing State in Selected Organic Superconductors, D. R. Harshman, Invited Talk, Gordon Research Conference on Organic Superconductors, Irsee, Germany, 22 – 27 September 1991.
- On the Nature of High-TC Superconductivity, D. R. Harshman, Invited Talk, AT&T Bell Laboratories, Murray Hill, New Jersey, USA, 9 October 1991.
- Search for an “Ideal” High-TC Superconductor, D. R. Harshman and A. P. Mills, Jr., Invited Talk, Department of Physics, Brandeis University, Waltham Massachusetts, USA, 29 October 1991.
- Optimization and Disorder in High-TC Superconductors, D. R. Harshman, Invited Talk, Brookhaven National Laboratories, Upton, New York, USA, 30 January 1992.
- Existence and Nature of the Fermi Surface in Bi2Sr2CaCu2O8+δ and Related Materials, D. R. Harshman, Invited Talk, APS Meeting, Indianapolis, Indiana, USA, 15 – 20 March 1992.
- Slow Muon Physics: Applications to Problems in Superconductivity, D. R. Harshman, Invited Talk, International Workshop on Low Energy Muon Science (LEMS ’93), Sante Fe, New Mexico, USA, 4 – 8 April 1993, M. Leon, Editor [Cross Ref: Paper].
- High-TC Superconductivity: Applications of µ+SR and Slow µ+ Beams, D. R. Harshman, Invited Talk, International School of Physics, Enrico Fermi Course on Positron Spectroscopy of Solids, Varenna, Italy, 6 – 16 July 1993 [Cross Ref: Paper].
- The Nature of High-TC Superconductivity: Fact and Fantasy, D. R. Harshman, Invited Talk, Department of Physics, Virginia Commonwealth University, Richmond, Virginia, USA, 22 October 1993.
- Muon Spin Rotation (µ+SR) and the Nature of High-TC Superconductivity, D. R. Harshman, Invited Talk, Department of Physics, The University of Utah, Salt Lake City, Utah, USA, 16 August 1996.
- Muon Spin Rotation in Sr2YRu1-uCuuO6, D. R. Harshman, Invited Talk, 2nd Annual Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials, Las Vegas, Nevada, USA, 31 May – 3 June 1999 [CrossRef: Paper].
- High-Temperature Superconductivity is Charge-Reservoir Superconductivity, J. D. Dow, H. A. Blackstead and D. R. Harshman, Invited Talk, Conference on Phase Transitions and Self-Organization in Electronic and Molecular Networks, Cambridge University, UK, 11 – 14 July 2000 [Cross-Ref: Paper].
- The Case Against Cuprate-Plane Superconductivity, J. D. Dow, H. A. Blackstead and D. R. Harshman, Invited Talk, 3rd International Conference on Stripes and High-TC Superconductivity (STRIPES 2000), Rome, Italy, 24-30 September 2000 [Cross-Ref: Paper].
- Feasibility of 125Xe Implantation at TRIUMF for Preparation of 125I Brachytherapy, J. Vincent, T. Ruth, A. Zyuzin, J. D’Auria, D. Ottewell and D. R. Harshman, Invited Talk, Pacifichem 2000 Meeting, Honolulu, Hawaii, 14-19 December 2000 [Cross-Ref. Patent].
- Magnetic Resonance and Mossbauer Studies of GdSr2Cu2RuO8, H. A. Blackstead, J. D. Dow, D. R. Harshman and D. B. Pulling, Third International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-3), Honolulu, Hawaii, USA, 15-19 January 2001 [Cross-Ref: Paper].
- Superconductivity and Magnetism in Sr2YRu1-uCuuO6 and Ba2GdRu1-uCuuO6, D. R. Harshman, W. J. Kossler, A. J. Greer, C. E. Stronach, D. R. Noakes, E. Koster, M. K. Wu, F. Z. Chien, H. A. Blackstead, D. B. Pulling and J. D. Dow, Invited Talk, Third International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-3), Honolulu, Hawaii, USA, 15-19 January 2001 [Cross-Ref: Paper].
- High-TemperatureSuperconductivity: The Role of BaO, SrO and Interstitial-Oxygen, J. D. Dow, H. A. Blackstead and D. R. Harshman, Third International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-3), Honolulu, Hawaii, USA, 15-19 January 2001 [Cross-Ref: Paper].
- Recent Progress in the Study of Ruthenate High Temperature Superconductivity, H. A. Blackstead, J. D. Dow, D. R. Harshman, P. J. McGinn, N. A. Licata, W. B. Yelon, I. Felner, D. Wang and Z. Ren, Invited Talk, International Conference on Modern Problems of Superconductivity, Yalta, Crimea, Ukraine, 9-14 September 2002.
- Locus of High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, Invited Talk, Fourth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New4SC-3), San Diego, California, 16-21 January 2003 [Cross-Ref. Paper].
- Verification of Nodeless Superconductivity Pairing in Single-Crystal YBa2Cu3O7, D. R. Harshman, W. J. Kossler, X. Wan, A. T. Fiory, A. J. Greer, D. R. Noakes, C. E. Stronach, E. Koster, A. Erb and J. D. Dow, Invited Talk, Fourth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New4SC-3), San Diego, California, 16-21 January 2003 [Cross-Ref. Paper].
- High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, Invited Talk,International Workshop on Unconventional Superconductors (U-Super), Campinas, Brazil, 20-24 May 2003 [Cross-Ref. Paper].
- Nodeless Pairing State Symmetry in YBa2Cu3O7, D. R. Harshman, J. D. Dow, W. J. Kossler, A. T. Foiry, A. J. Greer, D. R. Noakes, C. E. Stronach and E. Koster, Symposium on Emerging Mechanisms for High Temperature Superconductivity (SEMHTS), Miami, Florida, 11-16 January 2004 [Cross-Ref. Paper].
- High-Temperature Superconductivity of Oxides, J. D. Dow and D. R. Harshman, Symposium on Emerging Mechanisms for High Temperature Superconductivity (SEMHTS), Miami, Florida, 11-16 January 2004 [Cross Ref. Paper].
- Fluxon Pinning in the Nodeless Pairing State of Superconducting YBa2Cu3O7, A. T. Fiory, D. R. Harshman, J. Jung, I.-Y. Isaac, W. J. Kossler, X. Wan, A. J. Greer, D. R. Noakes, C. E. Stronach, E. Koster and J. D. Dow, Invited Talk, The 133rd Annual Meeting of the Minerals, Metals, Materials Society (TMS), Charlotte, North Carolina, 14-18 March 2004 [Cross-Ref. Paper] (slides).
- The Locus of Superconductivity in the Cuprates and the Ruthenates, J. D. Dow and D. R. Harshman, Invited Talk, Conference on Dynamical Energy Landscapes and Functional Systems, Sante Fe, New Mexico, USA, 28 March – 3 April 2004.
- The Discrepancy Between Muon Spectroscopy and Scanning Tunneling Microscopy and Photoemission: YBa2Cu3O7 and Bi2Sr2CaCu2O8, J. D. Dow and D. R. Harshman, Invited Talk, Fifth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-5), Chongqing, China, 10-15 June 2004.
- Thermal Conductivity of YBa2Cu3O7: s-wave interpretation, D. R. Harshman and J. D. Dow, Invited Talk, Fifth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-5), Chongqing, China, 10-15 June 2004 [Cross Ref. Paper].
- High-TC Superconductivity in Cuprates and Ruthenates, J. D. Dow, D. R. Harshman and Anthony T. Fiory, Invited Talk, Conference on Electron Correlation in New Materials and Nanosystems, NATO Advanced Research Workshop, Yalta, Crimea, Ukraine, 19-23 Sept. 2005.
- Nature of High-Temperature Supercondeuctivity, J. D. Dow and D. R. Harshman, Invited Talk,33rd Conference on the Physics and Chemistry of Semiconducting Interfaces (PCSI-33), Cocoa Beach, Florida 15-19 January (2006).
- BaO Planes, Not CuO2 Planes, Contain High-TC Superconductivity, J. D. Dow and D. R. Harshman, Invited Talk, Sixth International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-6), Sidney, Australia, 9-11 January 2007 [Cross Ref. Paper].
- Elements of Modern High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, Invited Talk, NATO Advanced Research Workshop, Electron Transport in Nanosystems (ETN-2007 ), Yalta, Ukraine, 17-21 September 2007, NATO Science Series: Electron Transport in Nanosystems to be published [Cross Ref. Paper].
- Symmetry of Superconductivity in YBa2Cu3O7: s or d, J. D. Dow, D. R. Harshman and A. T. Fiory, Invited Talk, Seventh International Conference on New Theories, Discoveries, and Applications of Superconductors and Related Materials (New3SC-7), Beijing, China, 13-16 May 2009 [Cross Ref. Paper].
Abstracts more
- Positive Muon Spin Rotation in Magnetic-Superconducting SmRh4B4, C. Y. Huang, Z. Fisk, C. W. Clawson, K. M. Crowe, S. S. Rosenblum, J. H. Brewer, D. R. Harshman, S. E. Lambert, M. S. Torikachvili and M. B. Maple, APS Meeting, Dallas, Texas, USA, March 1982.
- Magnetic Susceptibility, Proton NMR and Muon Spin Rotation (µSR) Studies of Unsupported Platinum Catalysts with Adsorbed H and O, R. F. Marzke, W. S. Glaunsinger, K. B. Rawlings, P. Van Rheenen, M. McKelvy, J. H. Brewer, D. R. Harshman and R. F. Kiefl, APS Meeting, Dallas, Texas, USA, March 1982.
- Muonium on Bare Silica Surfaces, D. R. Harshman, R. F. Kiefl and J. H. Brewer,Western Regional Nuclear Physics Conference, Banff, Alberta, Canada, February 1982.
- Muonium on Bare Silica Surfaces, D. R. Harshman, R. Keitel, R. F. Kiefl, M. Senba and J. H. Brewer, 2ndTrieste International Symposium on Statistical Mechanics of Adsorption, Trieste, Italy, July 1982.
- Observation of H NMR and of Muon Spin Rotation in Unsupported Platinum, R. F. Marzke, W. S. Glaunsinger, K. B. Rawlings, P. Van Reenen, M. McKelvy, J. H. Brewer, D. R. Harshman and R. F. Kiefl, California Catalysis Society – Annual Fall Meeting, Irvine, California, USA, October 1982.
- Behavior of Muonium on Silica Surfaces, D. R. Harshman, J. H. Brewer, M. Senba, R. Keitel and E. J. Ansaldo, CAP Meeting, University of Victoria, Victoria, B.C., Canada, June 1983.
- Spin Relaxation in YRh4B4 and SmRh4B4, E. J. Ansaldo, D. R. Harshman, J. H. Brewer, C. Y. Huang, K. M. Crowe and S. S. Rosenblum, CAP Meeting, University of Victoria, B.C., Canada, June 1983.
- Diffusion and Trapping of Muonium on Silica Surfaces, D. R. Harshman, J. H. Brewer, M. Senba, R. Keitel and E. J. Ansaldo, California Catalysis Society – Annual Fall Meeting, Brea, California, USA, October 1983.
- Muonium on Amorphous SiO2 Surfaces, D. R. Harshman, J. H. Brewer, R. Keitel, M. Senba, J. M. Bailey and E. J. Ansaldo, CAP Meeting, Universite de Sherbrooke, Sherbrooke, Quebec, Canada, June 1984.
- Giant Muon Knight Shifts in Antimony Alloys, J. H. Brewer, D. R. Harshman, E. Koster, S. R. Kreitzman and D. Ll. Williams, CAP Meeting, Universite de Sherbrooke, Sherbrooke, Quebec, Canada, June 1984.
- Muon Spin Relaxation and Crystalline Electric Field Effects in RERh4B4, D. R. Noakes, E. J. Ansaldo, J. H. Brewer, C. Y. Huang and D. R. Harshman, CAP Meeting, Universite de Sherbrooke, Sherbrooke, Quebec, Canada, June 1984.
- Muonium Diffusion on Amorphous SiO2 Surfaces, D. R. Harshman, J. H. Brewer, R. Keitel, M. Senba, J. M. Bailey and E. J. Ansaldo, International Chemical Congress of Pacific Basin Societies, Honolulu, Hawaii, USA, 16 – 21 December 1984.
- Measurement of the Reaction Rate of Muonium with the Surface of a Supported Platinum Catalyst by Muonium Spin Rotation (MSR), R. F. Marzke, W. S. Glaunsinger, D. R. Harshman, E. J. Ansaldo, R. Keitel, D. R. Noakes, M. Senba and J. H. Brewer, APS Meeting, Baltimore, Maryland, USA, March 1985.
- Measurement of the Reaction Rate of Muonium with the Surface of a Supported Platinum Catalyst by Muonium Spin Rotation (MSR), R. F. Marzke, W. S. Glaunsinger, D. R. Harshman, E. J. Ansaldo, R. Keitel, D. R. Noakes, M. Senba and J. H. Brewer, California Catalysis Society – Annual Spring Meeting, Menlo Park, California, USA, April 1985.
- Production of Muonium in Vacuum from Silica Powders, G. M. Marshall, G. A. Beer, T. Bowen, Z. Gelbart, P. Halverson, D. R. Harshman, K. R. Kendall, A. R. Kunselman, G. R. Mason, A. Olive and J. B. Warren, in Proceedings of the µSR-86 Conference, Uppsala, Sweden, 23 -27 June 1986.
- Temperature and Loading Dependence of Muonium Relaxation Rates in Silica-Supported Pt Catalysts, R. J. Marzke, D. R. Harshman, E. J. Ansaldo, R. Keitel, M. Senba, D. R. Noakes and J. H. Brewer, APS Meeting, New York, New York, USA, March 1987.
- Generation of Slow Positive Muons from Solid Rare-Gas Moderators, D. R. Harshman, A. P. Mills, Jr., J. L. Beveridge, K. R. Kendall, G. D. Morris, M. Senba, J. B. Warren, A. S. Rupaal and J. H. Turner, XI International Conference on Particles and Nuclei, Kyoto, Japan, April 1987.
- µ+SR in La2-xSrxCuO4 and YBa2Cu3O7, D. R. Harshman, G. Aeppli, G. P. Espinosa, A. S. Cooper, J. P. Remeika, L. F. Schneemeyer, J. V. Waszczak, B. Batlogg, E. J. Ansaldo, J. H. Brewer, R. F. Kiefl, G. Luke, T. Riseman and D. R. Noakes, APS Meeting, New Orleans, Louisianna, USA, 21 – 25 March 1988.
- Positron Studies in Single-Crystal YBa2Cu3O7, Y. C. Jean, D. R. Harshman, M. J. Fluss, L. F. Schneemeyer, A. L. Wachs, J. V. Waszczak, R. L. Howell, APS Meeting, New Orleans, Louisiana, USA, 21 – 25 March 1988.
- Electron Momentum Density Measurements of Single-Crystal La2CuO4, A. L. Wachs, P. Turchi, D. R. Harshman, Y. C. Jean, R. H. Howell, M. J. Fluss, J. Remeika, A. Cooper, and R. M. Fleming, APS Meeting, New Orleans, Louisiana, USA, 21 – 25 March 1988.
- Polarization and Resonance Properties of Magnetic X-Ray Scattering in Holmium, Doon Gibbs, D. R. Harshman, D. B. McWhan, D. Mills, and C. Vettier, APS Meeting, New Orleans, Louisiana, USA, 21 – 25 March 1988.
- Electronic Structure Investigations of High-TC Materials by Positron Annihilation Spectroscopy, A. L. Wachs, P. E. A. Turchi, R. Howell, M. J. Fluss, Y. C. Jean and D. R. Harshman, MRS Meeting, Reno, Nevada, USA, 5 – 8 April 1988.
- Magnetic Penetration Depth in the Organic Superconductor κ-[BEDT-TTF]2Cu[NCS]2, D. R. Harshman, R. N. Kleiman, R. C. Haddon, S. V. Chichester-Hicks, M. L. Kaplan, L. W. Rupp, Jr, T. Pfiz, D. Ll. Williams and D. B. Mitzi, APS Meeting, Anaheim, California, USA, 12 – 16 March 1990.
- Muon Spin Rotation Studies of Reactions of Muonium Adsorbates with Platinum Metal Aggregates on Pure Silica Powder Supports, R.F. Marzke, P.W. Percival, J.H. Brewer, R. Keitel, D.G. Fleming, E. J. Ansaldo, M. Senba, D.R. Noakes and D.R. Harshman, Third North American Chemical Congress, Toronto, Canada, 5 – 10 June 1988.
- Flux-Lattice Dynamics in Bi2Sr2CaCu2O8+δ, D. R. Harshman, R. N. Kleiman, G. Aeppli, G. P. Espinosa, D. B. Mitzi, T. Pfiz and D. Ll. Williams, APS Meeting, Anaheim, California, USA, 12 – 16 March 1990.
- Positron 2D-ACAR Measurements of Bi2Sr2CaCu2O8+δ, L. P. Chan, D. R. Harshman, K. G. Lynn and D. B. Mitzi, APS Meeting, Anaheim, California, USA, 12 – 16 March 1990.
- Magnetic Penetration Depth and Pairing State of UPt3, C. Broholm, R. N. Kleiman, G. Aeppli, D. R. Harshman, D. J. Bishop, E. Bucher, D. Ll. Williams, R. H. Heffner, and E. J. Ansaldo, APS Meeting, Anaheim, California, USA, 12 – 16 March 1990.
- Magnetic Penetration Depth and Flux-Dynamics in Single-Crystal Bi2Sr2CaCu2O8+δ, D. R. Harshman, R. N. Kleiman, M. Inui, G. P. Espinosa, D. B. Mitzi, A. Kapitulnik, T. Pfiz and D. Ll. Williams, APS Meeting, Cincinnati, Ohio, USA, 17 – 21 March 1991.
- Flux Lattice Disorder in High-TC Superconductors Observed by Muon-Spin Rotation, A. T. Fiory and D. R. Harshman, APS Meeting, Cincinnati, Ohio, USA, 17 – 21 March 1991.
- Application of Muons Spin Relaxation to Observe Vortex Dynamics in Superconductors, M. Inui and D. R. Harshman, APS Meeting, Cincinnati, Ohio, USA, 17 – 21 March 1991.
- Positron Annihilation Study of Selected Tl-Based Superconducting Systems, L. P. Chan, K. G. Lynn,D. R. Harshman, L. R. Monar, S. Massidda, Jaejun Yu, A. J. Freeman, C. P. Tigges, B. Morosin, D. S. Ginley and E. L. Venturini, APS Meeting, Indianapolis, Indiana, 16-20 March 1992.
- Correlations Among the 2D Electronic Parameters of Optimized High-TCSuperconductors, D. R. Harshman and A. P. Mills, Jr., APS Meeting, Indianapolis, Indiana, USA, 16 – 20 March 1992.
- Electronic Structure Measurements of the Organic Superconductor κ-[BEDT-TTF]2Cu[NCS]2 via Positron Annihilation, L. P. Chan, K. G. Lynn, D. R. Harshman, R. C. Haddon and M. L. Kaplan, APS Meeting, Seattle, Washington, USA, , 22 – 26 March 1993.
- Flux-Lattice Motion and Longitudinal Disordering in Anisotropic Superconductors, D. R. Harshman and A. T. Fiory, APS Meeting, Seattle, Washington, USA, 22 – 26 March 1993.
- Pair Momentum Distribution of Native Defects in SI GaAs Under Photoexcitation, J. P. Peng, M. T. Umlor, K. G. Lynn, D. J. Keeble and D. R. Harshman, APS Meeting, Pittsburg, Pennsylvania, USA, 21 – 25 March 1994.
- Study of the Electronic Structure of the SiO2/Si Buried Interface Using Positron Annihilation (2D-ACAR), J. P. Peng, K. G. Lynn, P. Asoka-Kumar, D. P. Becker and D. R. Harshman, APS Meeting, San Jose, California, USA, 21 – 25 March 1995.
- Study of the Electronic Structure of the SiO2/Si Buried Interface Using Positron Annihilation (2D-ACAR), J. P. Peng, K. G. Lynn, P. Asoka-Kumar, D. P. Becker and D. R. Harshman, The Fifth International Conference on the Formation of Semiconductor Interfaces, Princeton University, Princeton, New Jersey, USA, 26 – 30 June 1995.
- Study of the Defect Structure of the SiO2/Si Interface Using Positron Annihilation, J. P. Peng, K. G. Lynn, P. Asoka-Kumar, D. P. Becker, D. R. Harshman and A. T. Fiory, Conference on Physics and Chemistry of Semiconductor Interfaces, La Jolla, California, USA, 21 – 23 January 1996.
- Magnetic Transparency of the ab Planes of BSCCO and the Disorder and Dynamics of the Pancake Vortices, W. J. Kossler, K. G. Petzinger, X. Wan, Y. Dai, A. J. Greer, D. Ll. Williams, E. Koster, D. R. Harshman and D. B. Mitzi, APS Meeting, Los Angeles, California, USA, 16-20 March 1998 (abstract).
- Magnetism and Superconductivity of Rutheno-Cuprates, J. D. Dow, H. A. Blackstead and D. R. Harshman, Symposium on Itinerant and Localized States in HTSC (SILS), Klosters, Switzerland, 6 April 2000 – 10 April 2000.
- Magnetic Resonance, Muon Spin Rotation and Magnetization Measurements of GdSr_2Cu_2RuO_8, H. A. Blackstead, J. D. Dow, D. R. Harshman, D. B. Pulling, Z. F. Ren, D. Z. Wang, APS Meeting, Seattle, Washington, 12-16 March 2001 (abstract).
- Properties of the Superconducting Hole Condensate in Sr(2)YRu(1-u)Cu(u)O(6), D. R. Harshman, W. J. Kossler, A. J. Greer, C. E. Stronach, E. Koster, H. A. Blackstead, J. D. Dow, M. K. Wu and F. Z. Chien, APS Meeting, Seattle, Washington, 12-16 March 2001 (abstract).
- The Nature of High-Temperature Superconductivity, J. D. Dow, H. A. Blackstead and D. R. Harshman, APS Meeting, Seattle, Washington, 12-16 March 2001 (abstract).
- High-Temperature Superconductivity, J. D. Dow and D. R. Harshman, Gordon Conference on Superconductivity, Queen’s College, Oxford, UK, 9 – 14 September 2001.
- The Case Against High-Temperature Superconductivity Originating in the Cuprate Planes, J. D. Dow and D. R. Harshman, APS Meeting, Indianapolis, Indiana, 18 – 22 March 2002 (abstract).
- The Superconductivity of YBa2Cu3O7 is in the BaO-Layers, D. R. Harshman and J. D. Dow, APS Meeting, Montreal, Quebec, Canada, 22-26 March 2004 (abstract).
- Superconductivity is not in the Cuprate Planes, J. D. Dow, D. R. Harshman and H. A. Blackstead, APS Meeting, Montreal, Quebec, Canada, 22-26 March 2004 (abstract).
- Thermal Conductivity of YBa2Cu3O7, D. R. Harshman and J. D. Dow, APS Meeting, Los Angeles, California, 21-25 March 2005 (abstract).
- Feasibility of Superconductivity in Semiconductor Superlattices, K. P. Walsh, A. T. Fiory, N. M. Ravindra, D. R. Harshman and J. D. Dow, APS Meeting, Baltimore, Maryland 13-17 March 2006 (abstract).
- Nodeless Ground State Symmetry of YBa2Cu3O7-δ, D. R. Harshman, J. D. Dow and A. T. Fiory, APS Meeting, Denver, Colorado 5-9 March 2007 (abstract).
- Isotope Effect in High-TC Superconductors, D. R. Harshman, J. D. Dow and A. T. Fiory, APS Meeting, New Orleans, Louisiana, 10-14 March 2008 (abstract) (slides).
- High-Temperature Superconductivity: Status, J. D. Dow, D. R. Harshman and A. T. Fiory,APS Meeting, Pittsburgh, Pennsylvania, 16-20 March 2009 (abstract).
- Theory of High-TC Superconductivity: Accurate Predictions of TC, D. R. Harshman and A. T. Fiory, APS Meeting, Boston, Massachusetts, 27 February – 2 March, 2012 (abstract) [arXiv] [extended abstract].
- Optimal High-TC Superconductivity in Cs3C60, D. R. Harshman and A. T. Fiory, APS Meeting, Baltimore, Maryland, 14-18 March, 2016 (abstract) [extended abstract] (slides).
Work included in Magazine Articles, Journal Highlights and Editorials
- IOPscience LabTalk (no longer available online): High-temperature superconductivity theory accurately predicts transition temperatures (27 July 2011).
Other Activities
Government Review Panels
- Served on Department of Energy Peer Review Panel, Arlington, VA, 28-30 July 1992.
- Served on Department of Energy Peer Review Panel, Arlington, VA, 1-3 September 1992.
Patents & Copyrights
Radioactive Ion (Implantation), J. Vincent, T. Ruth, A. Zyuzin, J. D’Auria, D. Ottewell and D. R. Harshman (TRIUMF Patent – application for arterial stents). Priority date for all applications: 12 Dec. 2001.
Country/Entity
World / WIPO
European Union
European Union
European Union
Canada
Mexico
France
Germany
United Kingdom
Japan
Korea
United States
Publ. No.
WO 03/053509
EP 1 946 796 A2
EP 1 946 797 A2
1463533
N/A
WO 03/053509
N/A
N/A
N/A
2005-513451
N/A
US 2005/0118098 A1
Application No.
PCT/US02/39557
07150325.4
07150329.6
02787004.7
CA 2,470,006
PA/a/2004/005655
02787004.7
02787004.7
02787004.7
2003-554265
10-2004-7008719
10/498,368
Filing Date
12 Dec 2002
21 Dec 2007
21 Dec 2007
9 Jul 2004
10 Jun 2004
11 Jun 2004
12 Dec 2002
12 Dec 2002
12 Dec 2002
11 May 2004
5 Jun 2004
14 Jan 2005
These patents were allowed to lapse in 2010.
Layered Ionic Superconductor, D. R. Harshman and A. T. Fiory
Country/Entity
United States
Application No.
13/543,655
Copyrighted Verse
Voices (Registration No. PAu 2-167-731, 24 February 1997)
False Winds of Hope (Registration No. PAu 2-095-422, 14 June 1996)
Faraday Hollander (Registration No. Registration No. TXu 232 915, 20 March 1986)
Professional memberships
References
Dr. Anthony T. Fiory, Research Scientist in Physics
New Jersey Institute of Technology, Newark, New Jersey 07102
fiory@alum.mit.edu
Dr. William J. Kossler, Professor (Emeritus) of Physics
The College of William and Mary, Williamsburg, Virginia 23185
jkoss@wm.edu
Dr. Peter B. Littlewood, Professor of Physics
James Franck Institute, Univ. of Chicago, Chicago, Illinois 76063
Material Science Division
Argonne National Laboratory, Argonne, Illinois 60439
littlewood@uchicago.edu
Dr. James L. Smith, Chief Scientist & Fellow (Emeritus)
Los Alamos National Laboratory
Materials Technology: Metallurgy – MST-6
Los Alamos, New Mexico 87545
jlsmith@lanl.gov
Personal
Birth Date: 13 August 1956 | Honolulu, Hawaii
Interests and activities
Robotics, Biking, Poetry, Drums, Fishing, Camping, Off-roading