{"id":697,"date":"2018-04-20T01:16:34","date_gmt":"2018-04-20T01:16:34","guid":{"rendered":"http:\/\/girsh.rutgers.edu\/?p=697"},"modified":"2018-11-10T04:46:57","modified_gmt":"2018-11-10T04:46:57","slug":"high-tc-superconductivity-in-cakfe4as4-in-absence-of-nematic-fluctuations","status":"publish","type":"post","link":"https:\/\/girsh.rutgers.edu\/index.php\/2018\/04\/20\/high-tc-superconductivity-in-cakfe4as4-in-absence-of-nematic-fluctuations\/","title":{"rendered":"High Tc superconductivity in CaKFe4As4 in absence of nematic fluctuations"},"content":{"rendered":"<p><strong>Authors:<\/strong>\u00a0 W.-L.Zhang, W.R.Meier, T.Kong, P.C.Canfield and G. Blumberg<\/p>\n<p><strong>Abstract:\u00a0<\/strong><br \/>\n<img fetchpriority=\"high\" decoding=\"async\" class=\"alignright size-full wp-image-713\" src=\"http:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2018\/04\/Fig1.png\" alt=\"Fig1\" width=\"365\" height=\"359\" srcset=\"https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2018\/04\/Fig1.png 914w, https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2018\/04\/Fig1-300x294.png 300w, https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2018\/04\/Fig1-768x754.png 768w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><br \/>\nThe B<sub>2g<\/sub> symmetry Raman response shows no signatures of Pomeranchuk-like electronic nematic fluctuations which is observed for many other Fe-based superconductors. In the superconducting state, we identify three pair-breaking peaks at 13.8, 16.9 and 21 meV and full spectral weight suppression at low energies. The pair-breaking peak energies in Raman response are about 20% lower than twice the gap energies as measured by single-particle spectroscopy, implying a sub-dominant d-wave symmetry interaction. We analyze the superconductivity induced phonon self-energy effects and give an estimation of weak electron-phonon coupling constant \u03bb<sup>\u0393<\/sup>=0.0015.<\/p>\n<ul>\n<li><em><a href=\"https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.98.140501\" target=\"_blank\">Read on Phys. Rev. B<\/a><\/em><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Authors:\u00a0 W.-L.Zhang, W.R.Meier, T.Kong, P.C.Canfield and G. Blumberg Abstract:\u00a0 The B2g symmetry Raman response shows no signatures of Pomeranchuk-like electronic nematic fluctuations which is observed for many other Fe-based superconductors. In the superconducting state, we identify three pair-breaking peaks at 13.8, 16.9 and 21 meV and full spectral weight suppression at low energies. The pair-breaking &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/girsh.rutgers.edu\/index.php\/2018\/04\/20\/high-tc-superconductivity-in-cakfe4as4-in-absence-of-nematic-fluctuations\/\"> <span class=\"screen-reader-text\">High Tc superconductivity in CaKFe4As4 in absence of nematic fluctuations<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/posts\/697"}],"collection":[{"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/comments?post=697"}],"version-history":[{"count":16,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/posts\/697\/revisions"}],"predecessor-version":[{"id":849,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/posts\/697\/revisions\/849"}],"wp:attachment":[{"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/media?parent=697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/categories?post=697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/tags?post=697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}