{"id":9199,"date":"2020-01-07T15:08:00","date_gmt":"2020-01-07T13:08:00","guid":{"rendered":"https:\/\/lncmi.cnrs.fr\/?p=9199"},"modified":"2025-07-07T13:53:50","modified_gmt":"2025-07-07T11:53:50","slug":"field-reentrant-superconductivity-in-the-heavy-fermion-superconductor-ute2","status":"publish","type":"post","link":"https:\/\/lncmi.cnrs.fr\/en\/news\/field-reentrant-superconductivity-in-the-heavy-fermion-superconductor-ute2\/","title":{"rendered":"Field-reentrant superconductivity in the heavy-fermion superconductor UTe2"},"content":{"rendered":"\n<p>They present a study of the upper critical field of the newly discovered heavy fermion superconductor UTe2 by magnetoresistivity measurements in pulsed magnetic fields up to 60~T and static magnetic fields up to 35~T. We show that superconductivity survives up to the metamagnetic transition at <em>H<\/em>m\u224835~T at low temperature. Above <em>H<\/em>m superconductivity is suppressed. At higher temperature superconductivity is enhanced under magnetic field leading to reentrance of superconductivity or an almost temperature independent increase of <em>H<\/em>c2. By studying the angular dependence of the upper critical field close to the <em>b<\/em> axis (hard magnetization axis) we show that the maximum of the reentrant superconductivity temperature is depinned from the metamagnetic field. A key ingredient for the field-reinforcement of superconductivity on approaching <em>H<\/em>m appears to be an immediate interplay with magnetic fluctuations and a possible Fermi-surface reconstruction.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"450\" height=\"300\" src=\"https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2020\/01\/Photo9-450x300-1.png\" alt=\"\" class=\"wp-image-23342\" srcset=\"https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2020\/01\/Photo9-450x300-1.png 450w, https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2020\/01\/Photo9-450x300-1-300x200.png 300w\" sizes=\"(max-width: 450px) 100vw, 450px\" \/><\/figure>\n\n\n\n<p>Upper critical field of UTe2<\/p>\n\n\n\n<p><strong>Publication &#8211; <\/strong><a href=\"https:\/\/doi.org\/10.7566\/JPSJ.88.063707\">G. Knebel et al., Journal of the Physical Society of Japan 88 063707 (2019)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>They present a study of the upper critical field of the newly discovered heavy fermion superconductor UTe2 by magnetoresistivity measurements in pulsed magnetic fields up to 60~T and static magnetic [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16359,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[6136,6137,292],"tags":[],"post_folder":[],"class_list":["post-9199","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-heavy-fermions","category-heavy-fermions-news","category-news"],"jetpack_featured_media_url":"https:\/\/lncmi.cnrs.fr\/wp-content\/uploads\/2020\/01\/6o2ab2dp.png?ver=1740734954","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/posts\/9199","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/comments?post=9199"}],"version-history":[{"count":0,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/posts\/9199\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/media\/16359"}],"wp:attachment":[{"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/media?parent=9199"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/categories?post=9199"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/tags?post=9199"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/lncmi.cnrs.fr\/en\/wp-json\/wp\/v2\/post_folder?post=9199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}