{"id":8543,"date":"2026-02-08T08:14:25","date_gmt":"2026-02-08T16:14:25","guid":{"rendered":"http:\/\/physikon.net\/?p=8543"},"modified":"2026-03-17T10:00:57","modified_gmt":"2026-03-17T17:00:57","slug":"two-dimensional-superconductivity-at-a-cu-cu2o-interface","status":"publish","type":"post","link":"http:\/\/physikon.net\/?p=8543","title":{"rendered":"Two-dimensional Superconductivity at a Cu-Cu<sub>2<\/sub>O Interface"},"content":{"rendered":"<p><!--more--><\/p>\n<hr \/>\n<p style=\"text-align: justify;\"><a><strong>Two-dimensional Superconductivity at a Cu-Cu<sub>2<\/sub>O Interface<\/strong><\/a>, Anthony T. Fiory and Dale R. Harshman [arXiv]\n<p style=\"text-align: justify;\">Superconductivity in native\u00a0Cu<sub>2<\/sub>O on Cu is considered for an interfacial double charge layer\u00a0induced by adsorption of sub-monolayer\u00a0<sup>4<\/sup>He at temperature T ~ 4 K. Evidence for superconductivity associated with\u00a0<sup>4<\/sup>He adsorption is found in data for the Cu work function and the shielding of patch and lattice-strain electric fields. In the model presented for interfacial superconductivity, pairing of holes in Cu<sub>2<\/sub>O is mediated by Coulomb interactions with the screening elections induced in the Cu [1]. Based on a theory for layered superconductors, the intrinsic transition temperature, T<sub>C<\/sub> = \u03b2<em>n<\/em><sup>1\/2<\/sup>\/\u03b6, is determined by sheet charge density <em>n<\/em>, transverse distance between hole and electron layers \u03b6, and universal constant \u03b2 = 1247.4(3.7) K-\u00c5<sup>2<\/sup>[1]. Using parameters derived from experiment,results for T = 4.2 K are <em>n<\/em> = 1.6 &lt;\\times&gt;10<sup>12<\/sup> cm<sup>-2<\/sup>, T<sub>C<\/sub> \u2243 7.9 K and Berezinski\u012d-Kosterlitz-Thouless temperature T<sub>BKT<\/sub> \u2243 4.4 K. Helium desorption causes superconductivity to vanish above T \u2243 4.8 K.<\/p>\n<p style=\"text-align: justify;\">[1] D. R. Harshman and A. T. Fiory,\u00a0Physica C: Supercond. Applic.\u00a0<strong>632<\/strong>, 1354600 (2025).<\/p>\n<p style=\"text-align: justify;\">Abstract: A. T. Fiory and D. R. Harshman, <em>APS Global Physics Summit<\/em>, Denver, Colorado, 15-20 March 2026.<\/p>\n[<a href=\"https:\/\/summit.aps.org\/events\/OD02\/22\">abstract<\/a>] [<a href=\"http:\/\/physikon.net\/wp-content\/uploads\/APS-Poster-2026_a.pdf\">poster<\/a>] [<a href=\"http:\/\/physikon.net\/wp-content\/uploads\/PosterOD02SlideShow.pdf\">slides<\/a>]\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8543","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/physikon.net\/index.php?rest_route=\/wp\/v2\/posts\/8543","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/physikon.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/physikon.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/physikon.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/physikon.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8543"}],"version-history":[{"count":24,"href":"http:\/\/physikon.net\/index.php?rest_route=\/wp\/v2\/posts\/8543\/revisions"}],"predecessor-version":[{"id":8594,"href":"http:\/\/physikon.net\/index.php?rest_route=\/wp\/v2\/posts\/8543\/revisions\/8594"}],"wp:attachment":[{"href":"http:\/\/physikon.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8543"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/physikon.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8543"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/physikon.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8543"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}