{"id":35370,"date":"2024-04-05T09:32:22","date_gmt":"2024-04-05T01:32:22","guid":{"rendered":"https:\/\/www.physics.nus.edu.sg\/?page_id=35370"},"modified":"2024-04-08T08:57:23","modified_gmt":"2024-04-08T00:57:23","slug":"colloquium-2024-may-shuqiu-wang","status":"publish","type":"page","link":"https:\/\/www.physics.nus.edu.sg\/colloquium-2024-may-shuqiu-wang\/","title":{"rendered":"colloquium-2024-may-shuqiu-wang"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"35370\" class=\"elementor elementor-35370\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-57f8a73 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"57f8a73\" data-element_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-4d9c21f\" data-id=\"4d9c21f\" data-element_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-d6c2a32 elementor-widget elementor-widget-text-editor\" data-id=\"d6c2a32\" data-element_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<h1 style=\"text-align: center;\">COLLOQUIUM 2024<\/h1>\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6ddd763 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6ddd763\" data-element_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-66bf2f8\" data-id=\"66bf2f8\" data-element_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-899cad4 elementor-widget elementor-widget-text-editor\" data-id=\"899cad4\" data-element_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<h2 align=\"center\">Topological Surface State in a Spin-triplet Superconductor<\/h2>\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f0d3605 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f0d3605\" data-element_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-03bf5aa\" data-id=\"03bf5aa\" data-element_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-6fdbee7 elementor-widget elementor-widget-text-editor\" data-id=\"6fdbee7\" data-element_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<div class=\"table-responsive\"><table class=\"table table table-bordered\"><tbody><tr><td style=\"width: 20%;\">Speaker<\/td><td>Shuqiu Wang, University of Bristol<\/td><\/tr><tr><td style=\"width: 20%;\">Date\/Time<\/td><td>Wednesday, 8 May, 3PM<\/td><\/tr><tr><td style=\"width: 20%;\">Location<\/td><td>Conference room: S11-02-07<\/td><\/tr><tr><td style=\"width: 20%;\">Host<\/td><td>Asst\/Prof Anjan Soumyanarayanan<\/td><\/tr><\/tbody><\/table><\/div>\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-50bcd86 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"50bcd86\" data-element_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-top-column elementor-element elementor-element-eba1096\" data-id=\"eba1096\" data-element_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-dc27915 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"dc27915\" data-element_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<h4>Abstract<\/h4><p>The interplay of superconductivity and topology stands at the frontier of moden quantum matter physics. Intrinsic topological superconductivity is important because its electronic properties are topologically protected and robust against local perturbations. Although topological superconductivity appears probable in UTe<sub>2<\/sub>, its superconductive order parameter \u0394<sub>k<\/sub> has not yet been established. If spin-triplet, it should have odd parity so that \u0394<sub>-k<\/sub>=-\u0394<sub>k<\/sub> and, in addition, may break time-reversal symmetry. A distinctive identifier of such nodal spin-triplet superconductors is the appearance of an Andreev bound state (ABS) on surfaces parallel to a nodal axis, in the form of a topological surface band (TSB). Moreover, theory shows that specific TSB characteristics observable in tunneling to an <i>s<\/i>-wave superconductor distinguish between chiral and non-chiral \u0394<sub>k<\/sub>. To search for such phenomena in UTe<sub>2<\/sub>, we employ <i>s<\/i>-wave superconductive scan-tip imaging [1] and discover a distinct TSB signature, an intense zero-energy Andreev conductance maximum at the (0-11) crystal termination. Its imaging yields quasiparticle scattering interference evidence for two \u0394<sub>k<\/sub> nodes aligned with the crystal <i>a<\/i>-axis. Most critically, development of the zero-energy Andreev conductance peak into two finite-energy particle-hole symmetric conductance maxima as the tunnel barrier is reduced, signifies that UTe<sub>2<\/sub> superconductivity is non-chiral. Overall, this combination of a zero-energy Andreev conductance maximum at the UTe<sub>2<\/sub> (0-11) surface, internodal scattering along the <i>a<\/i>-axis, and splitting of Andreev conductance maximum due to <i>s<\/i>-wave proximity, categorizes the superconductive \u0394<sub>k<\/sub> of UTe<sub>2<\/sub> as the odd-parity non-chiral topological state [2].<\/p><p>[1] <em>Nature<\/em> <strong>618<\/strong>, 921 (2023).<br \/>[2] Gu, <strong>Wang<\/strong> et al., <em>Science in Review<\/em> (2024).<\/p><p><\/p>\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-top-column elementor-element elementor-element-d1d00bf\" data-id=\"d1d00bf\" data-element_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-27c5441 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"27c5441\" data-element_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<img fetchpriority=\"high\" decoding=\"async\" width=\"606\" height=\"322\" src=\"https:\/\/www.physics.nus.edu.sg\/wp-content\/uploads\/sites\/5\/2024\/04\/Shuqiu-Wang-pic.jpg\" class=\"attachment-full size-full wp-image-35375\" alt=\"\" srcset=\"https:\/\/www.physics.nus.edu.sg\/wp-content\/uploads\/sites\/5\/2024\/04\/Shuqiu-Wang-pic.jpg 606w, https:\/\/www.physics.nus.edu.sg\/wp-content\/uploads\/sites\/5\/2024\/04\/Shuqiu-Wang-pic-300x159.jpg 300w\" sizes=\"(max-width: 606px) 100vw, 606px\" \/>\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4a10bba elementor-reverse-tablet elementor-reverse-mobile elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4a10bba\" data-element_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-top-column elementor-element elementor-element-37526fc\" data-id=\"37526fc\" data-element_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-78a6a1b elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"78a6a1b\" data-element_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<img decoding=\"async\" width=\"607\" height=\"423\" src=\"https:\/\/www.physics.nus.edu.sg\/wp-content\/uploads\/sites\/5\/2024\/04\/Shuqiu-Wang.jpeg\" class=\"attachment-full size-full wp-image-35374\" alt=\"\" srcset=\"https:\/\/www.physics.nus.edu.sg\/wp-content\/uploads\/sites\/5\/2024\/04\/Shuqiu-Wang.jpeg 607w, https:\/\/www.physics.nus.edu.sg\/wp-content\/uploads\/sites\/5\/2024\/04\/Shuqiu-Wang-300x209.jpeg 300w\" sizes=\"(max-width: 607px) 100vw, 607px\" \/>\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<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-39d79e6\" data-id=\"39d79e6\" data-element_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-ff00f43 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"ff00f43\" data-element_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<h4>Biography<\/h4><p>I am an Assistant Professor leading the Visualizing Quantum Matter Research Lab at the University of Bristol. My research interests include topological states of matter, unconventional superconductivity, intrinsic topological superconductors and high-temperature superconductors in strongly correlated electronic systems. I have worked extensively on low-temperature Scanning Tunnelling Microscopy (SISTM) of novel emergent quantum states in unconventional superconductors. Prior to Bristol, I completed my PhD at the University of Oxford (2015-2019), and my postdoc at University of Oxford and Cornell University (2019-2023). I have received numerous awards from the University of Oxford. I was selected as a Rising Star in Physics by University of California, Berkeley in 2023.<\/p>\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<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>COLLOQUIUM 2024 Topological Surface State in a Spin-triplet Superconductor Speaker Shuqiu Wang, University of Bristol Date\/Time Wednesday, 8 May, 3PM&#8230;<\/p>\n","protected":false},"author":77,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-35370","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.physics.nus.edu.sg\/wp-json\/wp\/v2\/pages\/35370"}],"collection":[{"href":"https:\/\/www.physics.nus.edu.sg\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.physics.nus.edu.sg\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.physics.nus.edu.sg\/wp-json\/wp\/v2\/users\/77"}],"replies":[{"embeddable":true,"href":"https:\/\/www.physics.nus.edu.sg\/wp-json\/wp\/v2\/comments?post=35370"}],"version-history":[{"count":10,"href":"https:\/\/www.physics.nus.edu.sg\/wp-json\/wp\/v2\/pages\/35370\/revisions"}],"predecessor-version":[{"id":35402,"href":"https:\/\/www.physics.nus.edu.sg\/wp-json\/wp\/v2\/pages\/35370\/revisions\/35402"}],"wp:attachment":[{"href":"https:\/\/www.physics.nus.edu.sg\/wp-json\/wp\/v2\/media?parent=35370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}