{"id":3118,"date":"2022-03-07T14:12:00","date_gmt":"2022-03-07T14:12:00","guid":{"rendered":"https:\/\/www.polimix.fisi.polimi.it\/?p=3118"},"modified":"2022-03-07T14:19:32","modified_gmt":"2022-03-07T14:19:32","slug":"doping-dependence-of-the-electron-phonon-coupling-in-two-families-of-bilayer-superconducting-cuprates","status":"publish","type":"post","link":"https:\/\/www.polimix.fisi.polimi.it\/?p=3118","title":{"rendered":"Doping dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3118\" class=\"elementor elementor-3118\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8a0f2c2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8a0f2c2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-380297c\" data-id=\"380297c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-c59db2e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c59db2e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-eef29c2\" data-id=\"eef29c2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-936b60f elementor-widget elementor-widget-text-editor\" data-id=\"936b60f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/journals.aps.org\/prb\/abstract\/10.1103\/PhysRevB.105.115105\">Doping dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates<\/a><\/p>\n<p>While electron-phonon coupling (EPC) is crucial for Cooper pairing in conventional superconductors, its role in high-T<sub>C<\/sub> superconducting cuprates is debated. Using resonant inelastic x-ray scattering at the oxygen K edge, we study the EPC in Bi<sub>2<\/sub>Sr<sub>2<\/sub>CaCu<sub>2<\/sub>O<sub>8+\u03b4<\/sub>(Bi2212) and Nd<sub>1+x<\/sub>Ba<sub>2-x<\/sub>Cu<sub>3<\/sub>O<sub>7-\u03b4<\/sub>(NBCO) at different doping levels ranging from heavily underdoped (<span style=\"background-color: unset\">p<\/span><span style=\"background-color: unset\">=<\/span><span style=\"background-color: unset\">0.07<\/span><span style=\"background-color: unset\">) to overdoped (<\/span><span style=\"background-color: unset\">p<\/span><span style=\"background-color: unset\">=<\/span><span style=\"background-color: unset\">0.21<\/span><span style=\"background-color: unset\">). We analyze the data with a localized Lang-Firsov model that allows for the coherent excitations of two phonon modes. While electronic band dispersion effects are non-negligible, we are able to perform a study of the relative values of EPC matrix elements in these cuprate families. In the case of NBCO, the choice of the excitation energy allows us to disentangle modes related to the CuO chains and the CuO<sub>2<\/sub> planes. Combining the results from the two families, we find the EPC strength decreases with doping at<\/span><\/p>\n<p>q\u2225=(\u22120.25,0) r.l.u., but has a nonmonotonic trend as a function of doping at smaller momenta. This behavior is attributed to the screening effect of charge carriers. We also find that the phonon intensity is enhanced in the vicinity of the charge-density-wave excitations while the extracted EPC strength appears to be less sensitive to their proximity. By performing a comparative study of two cuprate families, we are able to identify general trends in the EPC for the cuprates and provide experimental input to theories invoking a synergistic role for this interaction in<br>\nd-wave pairing.<\/p><p><span style=\", Helvetica, Roboto, Arial, sans-serif;font-size: 14px;text-align: start\">PhysRevB.105.115105 (2022)<\/span><br><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-0a356e4\" data-id=\"0a356e4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c17f483 elementor-widget elementor-widget-image\" data-id=\"c17f483\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"720\" height=\"720\" src=\"https:\/\/www.polimix.fisi.polimi.it\/wp-content\/uploads\/2022\/03\/4953C40FEF584A11B0121FA7A64E7DF5.png\" class=\"attachment-large size-large wp-image-3122\" alt=\"\" srcset=\"https:\/\/www.polimix.fisi.polimi.it\/wp-content\/uploads\/2022\/03\/4953C40FEF584A11B0121FA7A64E7DF5.png 720w, https:\/\/www.polimix.fisi.polimi.it\/wp-content\/uploads\/2022\/03\/4953C40FEF584A11B0121FA7A64E7DF5-300x300.png 300w, https:\/\/www.polimix.fisi.polimi.it\/wp-content\/uploads\/2022\/03\/4953C40FEF584A11B0121FA7A64E7DF5-150x150.png 150w, https:\/\/www.polimix.fisi.polimi.it\/wp-content\/uploads\/2022\/03\/4953C40FEF584A11B0121FA7A64E7DF5-450x450.png 450w, https:\/\/www.polimix.fisi.polimi.it\/wp-content\/uploads\/2022\/03\/4953C40FEF584A11B0121FA7A64E7DF5-600x600.png 600w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Doping dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates While electron-phonon coupling (EPC) is crucial for Cooper pairing in conventional superconductors, its role in high-TC superconducting cuprates is debated. Using resonant inelastic x-ray scattering at the oxygen K edge, we study the EPC in Bi2Sr2CaCu2O8+\u03b4(Bi2212) and Nd1+xBa2-xCu3O7-\u03b4(NBCO) at different doping levels [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":3120,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-3118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publications"],"_links":{"self":[{"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/posts\/3118","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\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3118"}],"version-history":[{"count":4,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/posts\/3118\/revisions"}],"predecessor-version":[{"id":3125,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/posts\/3118\/revisions\/3125"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=\/wp\/v2\/media\/3120"}],"wp:attachment":[{"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.polimix.fisi.polimi.it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}