{"id":600,"date":"2017-12-07T03:09:47","date_gmt":"2017-12-07T03:09:47","guid":{"rendered":"http:\/\/girsh.rutgers.edu\/?p=600"},"modified":"2020-07-24T14:25:53","modified_gmt":"2020-07-24T18:25:53","slug":"anomalous-magneto-elastic-coupling-in-au-doped-bafe2as2","status":"publish","type":"post","link":"https:\/\/girsh.rutgers.edu\/index.php\/2017\/12\/07\/anomalous-magneto-elastic-coupling-in-au-doped-bafe2as2\/","title":{"rendered":"Anomalous magneto-elastic coupling in Au-doped BaFe2As2"},"content":{"rendered":"<p><strong>Authors:\u00a0<\/strong>\u00a0S.-F. Wu, W.-L. Zhang, L. Li, H.-B. Cao, H.-H. Kung, A. S. Sefat, H. Ding, P. Richard, and G. Blumberg<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-large wp-image-598\" src=\"http:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-10.26.55-AM-300x210.png\" alt=\"Screen Shot 2017-12-06 at 10.26.55 AM\" width=\"600\" height=\"420\" srcset=\"https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-10.26.55-AM-300x210.png 300w, https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-10.26.55-AM-768x538.png 768w, https:\/\/girsh.rutgers.edu\/wp-content\/uploads\/2017\/12\/Screen-Shot-2017-12-06-at-10.26.55-AM.png 833w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p><strong>Abstract:\u00a0<\/strong><\/p>\n<div class=\"page\" title=\"Page 1\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>We used polarization-resolved Raman scattering to study magneto-elastic coupling in Ba(Fe<sub>1-x<\/sub>Au<sub>x<\/sub>)<sub>2<\/sub>As<sub>2<\/sub> crystals as a function of light Au-doping, materials for which temperatures of the structural transition (T<sub>S<\/sub>) and of the magnetic ordering transition (T<sub>N<\/sub>) split. We study the appearance of the A<sub>g<\/sub> (As)phonon intensity in the XY scattering geometry that is very weak just below T<sub>S<\/sub>, but for which the intensity is significantly enhanced below T<sub>N<\/sub>. In addition, the A<sub>g<\/sub> (As) phonon shows an asymmetric line shape below T<sub>N<\/sub> and an anomalous linewidth broadening upon Au-doping in the magnetic phase. We demonstrate that the anomalous behavior of the A<sub>g<\/sub> (As) phonon mode in the XY scattering geometry can be consistently described by a Fano model involving the A<sub>g<\/sub> (As) phonon mode interacting with the B<sub>2g<\/sub> symmetry-like magnetic continuum in which the magneto-elastic coupling constant is proportional to the magnetic order parameter.<\/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\/prb\/abstract\/10.1103\/PhysRevB.102.014501\" target=\"_blank\">Read more on Phys. Rev. B 102, 014501 (2020)<\/a><\/em><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Authors:\u00a0\u00a0S.-F. Wu, W.-L. Zhang, L. Li, H.-B. Cao, H.-H. Kung, A. S. Sefat, H. Ding, P. Richard, and G. Blumberg Abstract:\u00a0 We used polarization-resolved Raman scattering to study magneto-elastic coupling in Ba(Fe1-xAux)2As2 crystals as a function of light Au-doping, materials for which temperatures of the structural transition (TS) and of the magnetic ordering transition (TN) &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/girsh.rutgers.edu\/index.php\/2017\/12\/07\/anomalous-magneto-elastic-coupling-in-au-doped-bafe2as2\/\"> <span class=\"screen-reader-text\">Anomalous magneto-elastic coupling in Au-doped BaFe2As2<\/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\/600"}],"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=600"}],"version-history":[{"count":8,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/posts\/600\/revisions"}],"predecessor-version":[{"id":1089,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/posts\/600\/revisions\/1089"}],"wp:attachment":[{"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/media?parent=600"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/categories?post=600"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/girsh.rutgers.edu\/index.php\/wp-json\/wp\/v2\/tags?post=600"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}