{"id":592,"date":"2017-12-07T02:56:02","date_gmt":"2017-12-07T02:56:02","guid":{"rendered":"http:\/\/girsh.rutgers.edu\/?p=592"},"modified":"2020-07-24T14:25:25","modified_gmt":"2020-07-24T18:25:25","slug":"magneto-elastic-coupling-in-fe-based-superconductors","status":"publish","type":"post","link":"https:\/\/girsh.rutgers.edu\/index.php\/2017\/12\/07\/magneto-elastic-coupling-in-fe-based-superconductors\/","title":{"rendered":"Magneto-elastic coupling in Fe-based superconductors"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-597 alignright\" src=\"http:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-9.49.54-PM-192x300.png\" alt=\"Screen Shot 2017-12-06 at 9.49.54 PM\" width=\"192\" height=\"300\" srcset=\"https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-9.49.54-PM-192x300.png 192w, https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-9.49.54-PM-768x1198.png 768w, https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-9.49.54-PM-657x1024.png 657w, https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-9.49.54-PM-960x1497.png 960w, https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-9.49.54-PM.png 994w\" sizes=\"(max-width: 192px) 100vw, 192px\" \/><\/p>\n<p><strong>Authors:\u00a0\u00a0<\/strong>S.-F. Wu, W.-L. Zhang, V. K. Thorsm\u00f8lle, G. F. Chen, G. T. Tan, P. C. Dai, Y. G. Shi, C. Q. Jin, T. Shibauchi, S. Kasahara, Y. Matsuda, A. S. Sefat, H. Ding, P. Richard, and G. Blumberg<\/p>\n<p><strong>Abstract:\u00a0<\/strong><\/p>\n<p>We used polarization-resolved Raman scattering to study the magneto-elastic coupling in the parent compounds of several families of Fe-based superconductors (BaFe<sub>2<\/sub>As<sub>2<\/sub>, EuFe<sub>2<\/sub>As<sub>2<\/sub>, NaFeAs, LiFeAs, FeSe and LaFeAsO). We observe an emergent A<sub>g<\/sub>-symmetry As phonon mode in the XY scattering geometry whose intensity is significantly enhanced below the magneto-structural transition only for compounds showing magnetic ordering. We conclude that the small lattice anisotropy is insufficient to induce the in-plane electronic polarizability anisotropy necessary for the observed phonon intensity enhancement, and interpret this enhancement below the Neel temperature in terms of the anisotropy of the magnetic moment and magneto-elastic coupling. We evidence a Fano line-shape in the XY scattering geometry resulting from a strong coupling between the A<sub>g<\/sub> (As) phonon mode and the B<sub>2g<\/sub> symmetry-like electronic continuum. Strong electron-phonon coupling may be relevant to superconductivity.<\/p>\n<ul>\n<li><em><a href=\"http:\/\/arxiv.org\/abs\/1712.01896\" target=\"_blank\">Read arXiv preprint<\/a><\/em><\/li>\n<li><em><a href=\"https:\/\/journals.aps.org\/prresearch\/abstract\/10.1103\/PhysRevResearch.2.033140\">Read more on PHYSICAL REVIEW RESEARCH 2, 033140 (2020)<\/a><\/em><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Authors:\u00a0\u00a0S.-F. Wu, W.-L. Zhang, V. K. Thorsm\u00f8lle, G. F. Chen, G. T. Tan, P. C. Dai, Y. G. Shi, C. Q. Jin, T. Shibauchi, S. Kasahara, Y. Matsuda, A. S. Sefat, H. Ding, P. Richard, and G. Blumberg Abstract:\u00a0 We used polarization-resolved Raman scattering to study the magneto-elastic coupling in the parent compounds of several &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/girsh.rutgers.edu\/index.php\/2017\/12\/07\/magneto-elastic-coupling-in-fe-based-superconductors\/\"> <span class=\"screen-reader-text\">Magneto-elastic coupling in Fe-based superconductors<\/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\/592"}],"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=592"}],"version-history":[{"count":6,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/posts\/592\/revisions"}],"predecessor-version":[{"id":1133,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/posts\/592\/revisions\/1133"}],"wp:attachment":[{"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/media?parent=592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/categories?post=592"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/tags?post=592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}