{"id":3995,"date":"2024-12-24T09:21:21","date_gmt":"2024-12-24T09:21:21","guid":{"rendered":"https:\/\/www.polimix.fisi.polimi.it\/?p=3995"},"modified":"2024-12-24T09:37:11","modified_gmt":"2024-12-24T09:37:11","slug":"spin-excitations-in-nd1%e2%88%92%f0%9d%91%a5%e2%81%a2sr%f0%9d%91%a5%e2%81%a2nio2-and-yba2%e2%81%a2cu3%e2%81%a2o7%e2%88%92%f0%9d%9b%bf-the-influence-of-hubbard-%f0%9d%91%88","status":"publish","type":"post","link":"https:\/\/www.polimix.fisi.polimi.it\/?p=3995","title":{"rendered":"Spin excitations in\u00a0Nd1\u2212\ud835\udc65\u2062Sr\ud835\udc65\u2062NiO2\u00a0and\u00a0YBa2\u2062Cu3\u2062O7\u2212\ud835\udeff: The influence of Hubbard\u00a0\ud835\udc48"},"content":{"rendered":"\n<p>On Monday, December 23rd 2024 our study of magnetic excitations in the Infinite-Layer nickelate Nd<sub>1-x<\/sub>Sr<sub>x<\/sub>NiO<sub>2<\/sub> has been published on Physical Review B. Besides momentum and polarization-resolved RIXS analysis, a brand-new model is employed to fit the polarimetric data. The figure above shows Energy loss\/momentum maps of Nd<sub>1\u2212x<\/sub>Sr<sub>x<\/sub>NiO2, for the two doping levels x=0 (a) and x=0.2 (b). Eye guides for the phonon and magnon peak are displayed in yellow and cyan respectively.<\/p>\n\n\n\n<p>The paper is accessible at the following link:<\/p>\n\n\n\n<p class=\"has-text-align-center\"><a href=\"https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.110.224431\">Rosa et al., Physical Review B, 110(2024), 224431<\/a><\/p>\n\n\n\n<p>We use Resonant Inelastic X-ray Scattering (RIXS) to compare the doping dependence of magnetic excitations of an Infinite-Layer nickelate to those of a prototypical superconducting cuprate. The polarization analysis of RIXS spectra establishes the dominant spin-flip nature of the mid-infrared peak in both cases. Hole doping leads to opposite behavior of the magnetic energy in the two materials. By fitting the data with an original Hubbard-based model for dynamic susceptibility, we find that <em>t<\/em> is comparable in the two materials while <em>U<\/em> is about twice larger in the nickelate. This finding accounts for the smaller magnetic bandwidth of nickelates and for its decrease upon doping.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>On Monday, December 23rd 2024 our study of magnetic excitations in the Infinite-Layer nickelate Nd1-xSrxNiO2 has been published on Physical Review B. Besides momentum and polarization-resolved RIXS analysis, a brand-new model is employed to fit the polarimetric data. The figure above shows Energy loss\/momentum maps of Nd1\u2212xSrxNiO2, for the two doping levels x=0 (a) and [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":3996,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[20,21,18],"class_list":["post-3995","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publications","tag-magnons","tag-polarimeter","tag-rixs"],"_links":{"self":[{"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/posts\/3995","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3995"}],"version-history":[{"count":7,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/posts\/3995\/revisions"}],"predecessor-version":[{"id":4007,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/posts\/3995\/revisions\/4007"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/media\/3996"}],"wp:attachment":[{"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}