{"id":435,"date":"2022-10-03T18:22:21","date_gmt":"2022-10-03T22:22:21","guid":{"rendered":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/?p=435"},"modified":"2022-10-04T14:50:08","modified_gmt":"2022-10-04T18:50:08","slug":"quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction","status":"publish","type":"post","link":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/","title":{"rendered":"Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\" wp-image-439 aligncenter\" src=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-300x167.png\" alt=\"\" width=\"466\" height=\"259\" srcset=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-300x167.png 300w, https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-768x428.png 768w, https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface.png 999w\" sizes=\"(max-width: 466px) 100vw, 466px\" \/>The antiferromagnetic topological insulator MnBi<sub>2<\/sub>Te<sub>4<\/sub> features lots of exotic physical phenomena at low temperatures, forging a new direction that joins topological materials with magnetic materials. Yet a missing ingredient in the grand inquiry into antiferromagnetic topological insulators is how the antiferromagnetic behavior can manifest in the quantum tunneling, which has wide applications in quantum computing and related applications. To this end, PI-Cheng\u2019s group studied the transport properties of a Josephson junction consisting of two identical s-wave superconductors separated by an even-layer MnBi<sub>2<\/sub>Te<sub>4<\/sub>. By numerically calculating the supercurrent in the presence of a perpendicular magnetic field, PI-Cheng found that the quantum interference in such a device setup exhibits distinct patterns when the MnBi<sub>2<\/sub>Te<sub>4<\/sub> is in different magnetic states. In its antiferromagnetic state, the MnBi<sub>2<\/sub>Te<sub>4<\/sub> is an axion insulator supporting an extended \u201chinge\u201d supercurrent, which leads to a sinusoidal interference pattern decaying with the field strength. In the ferromagnetic state, on the other hand, the MnBi<sub>2<\/sub>Te<sub>4<\/sub> is a Chern insulator and the unbalanced chiral supercurrents on opposite edges give rise to a highly asymmetric interference pattern. If the MnBi<sub>2<\/sub>Te<sub>4<\/sub> turns into a metal as the Fermi level is tuned into the conduction band, the interference exhibits a Fraunhofer pattern due to the uniformly distributed bulk supercurrent. This work unravels a strong indicator to identify different phases in MnBi<sub>2<\/sub>Te<sub>4<\/sub> and can be verified directly by experiments.<\/p>\n<p>This article was published in Physical Review Research and is available <a href=\"https:\/\/journals.aps.org\/prresearch\/abstract\/10.1103\/PhysRevResearch.4.033227\">here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The antiferromagnetic topological insulator MnBi2Te4 features lots of exotic physical phenomena at low temperatures, forging a new direction that joins topological materials with magnetic materials. Yet a missing ingredient in <a class=\"more-link\" href=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/\">Continue Reading &rarr;<\/a><\/p>\n","protected":false},"author":84,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[7],"tags":[],"class_list":["post-435","post","type-post","status-publish","format-standard","hentry","category-publications"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction -\" \/>\n<meta property=\"og:description\" content=\"The antiferromagnetic topological insulator MnBi2Te4 features lots of exotic physical phenomena at low temperatures, forging a new direction that joins topological materials with magnetic materials. Yet a missing ingredient in Continue Reading &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-10-03T22:22:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-10-04T18:50:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-300x167.png\" \/>\n<meta name=\"author\" content=\"Gregory Fritjofson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Gregory Fritjofson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/\"},\"author\":{\"name\":\"Gregory Fritjofson\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90\"},\"headline\":\"Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction\",\"datePublished\":\"2022-10-03T22:22:21+00:00\",\"dateModified\":\"2022-10-04T18:50:08+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/\"},\"wordCount\":252,\"image\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-300x167.png\",\"articleSection\":[\"Publications\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/\",\"name\":\"Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction -\",\"isPartOf\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-300x167.png\",\"datePublished\":\"2022-10-03T22:22:21+00:00\",\"dateModified\":\"2022-10-04T18:50:08+00:00\",\"author\":{\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#primaryimage\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface.png\",\"contentUrl\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface.png\",\"width\":999,\"height\":557,\"caption\":\"Two graphs depict different observed phenomena in materials 'Al,' 'Cl,' and 'metal.' Graph (a) plots Is(\u03b8) vs. \u03b8\/\u03c0, while graph (b) shows Ic(\u03b5)\/Ic(\u03b5\u2080) vs. \u03b5 = Lx\/Ly. A schematic of experimental setup is inset.\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#website\",\"url\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/\",\"name\":\"\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90\",\"name\":\"Gregory Fritjofson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g\",\"caption\":\"Gregory Fritjofson\"},\"url\":\"https:\/\/sciences.ucf.edu\/physics\/afmspin\/author\/gr464854\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction -","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/","og_locale":"en_US","og_type":"article","og_title":"Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction -","og_description":"The antiferromagnetic topological insulator MnBi2Te4 features lots of exotic physical phenomena at low temperatures, forging a new direction that joins topological materials with magnetic materials. Yet a missing ingredient in Continue Reading &rarr;","og_url":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/","article_published_time":"2022-10-03T22:22:21+00:00","article_modified_time":"2022-10-04T18:50:08+00:00","og_image":[{"url":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-300x167.png","type":"","width":"","height":""}],"author":"Gregory Fritjofson","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Gregory Fritjofson","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#article","isPartOf":{"@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/"},"author":{"name":"Gregory Fritjofson","@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90"},"headline":"Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction","datePublished":"2022-10-03T22:22:21+00:00","dateModified":"2022-10-04T18:50:08+00:00","mainEntityOfPage":{"@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/"},"wordCount":252,"image":{"@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#primaryimage"},"thumbnailUrl":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-300x167.png","articleSection":["Publications"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/","url":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/","name":"Quantum interference in a superconductor-MnBi2Te4-superconductor Josephson junction -","isPartOf":{"@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#website"},"primaryImageOfPage":{"@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#primaryimage"},"image":{"@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#primaryimage"},"thumbnailUrl":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface-300x167.png","datePublished":"2022-10-03T22:22:21+00:00","dateModified":"2022-10-04T18:50:08+00:00","author":{"@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/quantum-interference-in-a-superconductor-mnbi2te4-superconductor-josephson-junction\/#primaryimage","url":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface.png","contentUrl":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-content\/uploads\/sites\/31\/2022\/10\/FIG-2-Quantum-Interface.png","width":999,"height":557,"caption":"Two graphs depict different observed phenomena in materials 'Al,' 'Cl,' and 'metal.' Graph (a) plots Is(\u03b8) vs. \u03b8\/\u03c0, while graph (b) shows Ic(\u03b5)\/Ic(\u03b5\u2080) vs. \u03b5 = Lx\/Ly. A schematic of experimental setup is inset."},{"@type":"WebSite","@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#website","url":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/","name":"","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/#\/schema\/person\/dfe9c061eec5b3ae750208f34e51ca90","name":"Gregory Fritjofson","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d69d9a6f73b3b6c0bcb07d2dccdb90a51eddff27039cbb9b8475a2c1fa28df07?s=96&d=mm&r=g","caption":"Gregory Fritjofson"},"url":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/author\/gr464854\/"}]}},"_links":{"self":[{"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/posts\/435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/users\/84"}],"replies":[{"embeddable":true,"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/comments?post=435"}],"version-history":[{"count":4,"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/posts\/435\/revisions"}],"predecessor-version":[{"id":460,"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/posts\/435\/revisions\/460"}],"wp:attachment":[{"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/media?parent=435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/categories?post=435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sciences.ucf.edu\/physics\/afmspin\/wp-json\/wp\/v2\/tags?post=435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}