{"id":4756,"date":"2017-01-01T00:00:00","date_gmt":"2017-01-01T08:00:00","guid":{"rendered":"https:\/\/wpdev.hmc.edu\/physics\/2017\/01\/01\/superconductor-to-weak-insulator-transitions-in-disordered-tantalum-nitride-films\/"},"modified":"2025-12-19T09:04:12","modified_gmt":"2025-12-19T17:04:12","slug":"superconductor-to-weak-insulator-transitions-in-disordered-tantalum-nitride-films","status":"publish","type":"physics_publications","link":"https:\/\/www.hmc.edu\/physics\/research\/publications\/superconductor-to-weak-insulator-transitions-in-disordered-tantalum-nitride-films\/","title":{"rendered":"Superconductor To Weak-Insulator Transitions in Disordered Tantalum Nitride Films"},"content":{"rendered":"\n<p id=\"authors\"><span class=\"facauthor\">Nicholas P. Breznay<\/span>*, Mihir Tendulkar, Li Zhang, Sang-Chul Lee, and Aharon Kapitulnik<\/p>\n\n\n\n<p id=\"doc-link\"><a href=\"https:\/\/www.hmc.edu\/physics\/wp-content\/uploads\/sites\/22\/2023\/02\/pub-133.pdf\">Superconductor To Weak-Insulator Transitions in Disordered Tantalum Nitride Films (PDF)<\/a><\/p>\n\n\n\n<p id=\"journal\"><span class=\"journal-title\">Physical Review B<\/span> <strong data-vol=\"96\">96<\/strong> <span id=\"journal-year\">(2017)<\/span> <span id=\"journal-pages\" data-pages=\"134522\">134522<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Abstract<\/h2>\n\n\n\n<p>We study the two-dimensional superconductor-insulator transition (SIT) in thin films of tantalum nitride. At zero magnetic field, films can be disorder-tuned across the SIT by adjusting thickness and film stoichiometry; insulating films exhibit classical hopping transport. Superconducting films exhibit a magnetic-field-tuned SIT, whose insulating ground state at high field appears to be a quantum-corrected metal. Scaling behavior at the field-tuned SIT shows classical percolation critical exponents ( z \u03bd approx 1.3 ), with a corresponding critical field ( H_c ll H_{c2} ), the upper critical field. The Hall effect exhibits a crossing point near ( H_c ), but with a nonuniversal critical value ( \u03c1_{xy}^{c} ) comparable to the normal-state Hall resistivity. We propose that high-carrier-density metals will always exhibit this pattern of behavior at the boundary between superconducting and (trivially) insulating ground states.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nicholas P. Breznay*, Mihir Tendulkar, Li Zhang, Sang-Chul Lee, and Aharon Kapitulnik Superconductor To Weak-Insulator Transitions in Disordered Tantalum Nitride [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"template":"","publication_author":[12],"class_list":["post-4756","physics_publications","type-physics_publications","status-publish","hentry","publication_author-breznay"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/physics_publications\/4756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/physics_publications"}],"about":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/types\/physics_publications"}],"author":[{"embeddable":true,"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/users\/1"}],"wp:attachment":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/media?parent=4756"}],"wp:term":[{"taxonomy":"publication_author","embeddable":true,"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/publication_author?post=4756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}