{"id":614,"date":"2018-10-15T10:11:16","date_gmt":"2018-10-15T08:11:16","guid":{"rendered":"https:\/\/sacepe-quest.neel.cnrs.fr\/?p=614"},"modified":"2018-10-17T20:43:44","modified_gmt":"2018-10-17T18:43:44","slug":"614","status":"publish","type":"post","link":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/2018\/10\/15\/614\/","title":{"rendered":"Nature Physics paper on “Low-T anomaly in disordered superconductors” is online !"},"content":{"rendered":"
\n

L<\/span>o<\/span>w<\/span>-temper<\/span>atur<\/span>e anomaly in disor<\/span>der<\/span>ed <\/span>super<\/span>c<\/span>onductor<\/span>s near <\/span>B<\/span>c2<\/span> as a v<\/span>or<\/span>te<\/span>x<\/span>-glas<\/span>s pr<\/span>oper<\/span>ty<\/span><\/a><\/h4>\n<\/div>\n
\"\"Strongly disor<\/span>dered super<\/span>c<\/span>onductors in a magnetic field e<\/span>xhibit many char<\/span>acteristic properties of type-II super<\/span>conductivit<\/span>y<\/span>\u2014<\/span>ex<\/span>cept at lo<\/span>w temper<\/span>atur<\/span>es, where an anomalous linear t<\/span>emper<\/span>ature dependenc<\/span>e of the r<\/span>esistiv<\/span>e critical field B<\/span>c2<\/span> is routinely <\/span>observ<\/span>ed. T<\/span>his beha<\/span>viour violates the c<\/span>onv<\/span>entional theory of superconductivit<\/span>y<\/span>, and its origin has posed a long<\/span>-standing puz<\/span>zle. <\/span>Here w<\/span>e r<\/span>eport sy<\/span>stematic measur<\/span>ements of the critical magnetic field and current on amorphous indium o<\/span>xide films with vari<\/span>ous lev<\/span>els of disorder<\/span>. Surprisingly<\/span>, our measurements show that the B<\/span>c2<\/span> anomaly is acc<\/span>ompanied by mean-<\/span>field-lik<\/span>e scaling of <\/span>the critical current. Based on a c<\/span>omprehensiv<\/span>e theoretical study w<\/span>e argue that these observ<\/span>ations are a c<\/span>onsequenc<\/span>e of the <\/span>v<\/span>ortex<\/span>-glass gr<\/span>ound state and its thermal fluctuations. Our theory further predicts that the linear<\/span>-temper<\/span>atur<\/span>e anomaly occur<\/span>s <\/span>more g<\/span>ener<\/span>ally in both films and disordered bulk super<\/span>conduct<\/span>ors, with a slope that depends on the normal-s<\/span>tate sheet r<\/span>esis<\/span>tance, which w<\/span>e c<\/span>onfirm experimentally<\/span>.<\/span><\/div>\n","protected":false},"excerpt":{"rendered":"

Low-temperature anomaly in disordered superconductors near Bc2 as a vortex-glass property Strongly disordered superconductors in a magnetic field exhibit many characteristic properties of type-II superconductivity\u2014except at low temperatures, where an anomalous linear temperature dependence of the resistive critical field Bc2<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-614","post","type-post","status-publish","format-standard","hentry","category-non-classe"],"_links":{"self":[{"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/posts\/614","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/comments?post=614"}],"version-history":[{"count":5,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/posts\/614\/revisions"}],"predecessor-version":[{"id":631,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/posts\/614\/revisions\/631"}],"wp:attachment":[{"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/media?parent=614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/categories?post=614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sacepe-quest.neel.cnrs.fr\/index.php\/wp-json\/wp\/v2\/tags?post=614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}