{"id":7405,"date":"2018-11-26T11:58:09","date_gmt":"2018-11-26T10:58:09","guid":{"rendered":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/"},"modified":"2018-11-26T11:58:09","modified_gmt":"2018-11-26T10:58:09","slug":"quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan","status":"publish","type":"events","link":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/","title":{"rendered":"Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan"},"content":{"rendered":"<section class=\"wp-block-unilux-blocks-free-section section\"><div class=\"container xl:max-w-screen-xl\"><p>We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band\u00a0structure. By taking into account both bulk and surface contributions to the exchange interaction between the localized spins,<\/p><p>we demonstrate that the surface contribution in general dominates the bulk one at distances larger than the inverse node separation due to a weaker power-law decay. We find a strong anisotropy of the surface term with respect to the spins being aligned along the node separation axis or perpendicular to it. In the many impurity dilute regime, this implies formation of quasi-one dimensional magnetic stripes orthogonal to the node axis. We also discuss the effects of a surface spin-mixing term coupling electrons from spin-degenerate Fermi arcs induced by a superconducting proximity pairing term<\/p><\/div><\/section>","protected":false},"excerpt":{"rendered":"<p>We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band\u00a0structure. By taking into account both bulk and surface contributions to the exchange interaction between the localized spins,we demonstrate that the surface contribution in general dominates the bulk one at distances larger than the inverse node separation due to a weaker power-law decay. We find a strong anisotropy of the surface term with respect to the spins being aligned along the node separation axis or perpendicular to it. In the many impurity dilute regime, this implies formation of quasi-one dimensional magnetic stripes orthogonal to the node axis. We also discuss the effects of a surface spin-mixing term coupling electrons from spin-degenerate Fermi arcs induced by a superconducting proximity pairing term<\/p>\n","protected":false},"author":0,"featured_media":7406,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"featured_image_focal_point":[],"show_featured_caption":false,"ulux_newsletter_groups":"","uluxPostTitle":"","uluxPrePostTitle":"","_trash_the_other_posts":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"event_start_date":"2018-11-27 11:00:00","event_end_date":"2018-11-27 13:00:00","event_speaker_name":"Vardan Kaladzhyan","event_speaker_link":"","event_is_online":false,"event_location":"Campus Limpertsberg  - B\u00e2timent des Sciences - BSC E002-001","event_street":"University of Luxembourg","event_location_link":"","event_zip_code":"1511","event_city":"Luxembourg","event_country":"LU"},"events-topic":[316],"events-type":[],"organisation":[76,25,226],"authorship":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v22.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan - Universit\u00e9 du Luxembourg<\/title>\n<meta name=\"description\" content=\"We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band\u00a0structure. By taking into account both bulk and surface contributions to the exchange interaction between the localized spins,we demonstrate that the surface contribution in general dominates the bulk one at distances larger than the inverse node separation due to a weaker power-law decay. We find a strong anisotropy of the surface term with respect to the spins being aligned along the node separation axis or perpendicular to it. In the many impurity dilute regime, this implies formation of quasi-one dimensional magnetic stripes orthogonal to the node axis. We also discuss the effects of a surface spin-mixing term coupling electrons from spin-degenerate Fermi arcs induced by a superconducting proximity pairing term\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan\" \/>\n<meta property=\"og:description\" content=\"We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band\u00a0structure. By taking into account both bulk and surface contributions to the exchange interaction between the localized spins,we demonstrate that the surface contribution in general dominates the bulk one at distances larger than the inverse node separation due to a weaker power-law decay. We find a strong anisotropy of the surface term with respect to the spins being aligned along the node separation axis or perpendicular to it. In the many impurity dilute regime, this implies formation of quasi-one dimensional magnetic stripes orthogonal to the node axis. We also discuss the effects of a surface spin-mixing term coupling electrons from spin-degenerate Fermi arcs induced by a superconducting proximity pairing term\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/\" \/>\n<meta property=\"og:site_name\" content=\"UNI FR\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/uni.lu\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2026\/03\/03120045\/UNIV_SM-Profile_1600x1600px-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"2560\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/\",\"url\":\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/\",\"name\":\"Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan - Universit\u00e9 du Luxembourg\",\"isPartOf\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2018\/11\/default-5.jpg\",\"datePublished\":\"2018-11-26T10:58:09+00:00\",\"dateModified\":\"2018-11-26T10:58:09+00:00\",\"description\":\"We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band\u00a0structure. By taking into account both bulk and surface contributions to the exchange interaction between the localized spins,we demonstrate that the surface contribution in general dominates the bulk one at distances larger than the inverse node separation due to a weaker power-law decay. We find a strong anisotropy of the surface term with respect to the spins being aligned along the node separation axis or perpendicular to it. In the many impurity dilute regime, this implies formation of quasi-one dimensional magnetic stripes orthogonal to the node axis. We also discuss the effects of a surface spin-mixing term coupling electrons from spin-degenerate Fermi arcs induced by a superconducting proximity pairing term\",\"breadcrumb\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#primaryimage\",\"url\":\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2018\/11\/default-5.jpg\",\"contentUrl\":\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2018\/11\/default-5.jpg\",\"width\":1500,\"height\":1125},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.uni.lu\/fr\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Events\",\"item\":\"https:\/\/www.uni.lu\/fr\/events\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.uni.lu\/fr\/#website\",\"url\":\"https:\/\/www.uni.lu\/fr\/\",\"name\":\"Uni.lu\",\"description\":\"Universit\u00e9 du Luxembourg\",\"publisher\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/#organization\"},\"alternateName\":\"Universit\u00e9 du Luxembourg\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.uni.lu\/fr\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.uni.lu\/fr\/#organization\",\"name\":\"Universit\u00e9 du Luxembourg\",\"alternateName\":\"Uni.lu\",\"url\":\"https:\/\/www.uni.lu\/fr\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.uni.lu\/fr\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2026\/03\/03120045\/UNIV_SM-Profile_1600x1600px-scaled.jpg\",\"contentUrl\":\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2026\/03\/03120045\/UNIV_SM-Profile_1600x1600px-scaled.jpg\",\"width\":2560,\"height\":2560,\"caption\":\"Universit\u00e9 du Luxembourg\"},\"image\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/uni.lu\",\"https:\/\/www.linkedin.com\/school\/university-of-luxembourg\/\",\"https:\/\/www.instagram.com\/uni.lu\",\"https:\/\/www.youtube.com\/@uni_lu\",\"https:\/\/en.wikipedia.org\/wiki\/University_of_Luxembourg\"]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan - Universit\u00e9 du Luxembourg","description":"We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band\u00a0structure. By taking into account both bulk and surface contributions to the exchange interaction between the localized spins,we demonstrate that the surface contribution in general dominates the bulk one at distances larger than the inverse node separation due to a weaker power-law decay. We find a strong anisotropy of the surface term with respect to the spins being aligned along the node separation axis or perpendicular to it. In the many impurity dilute regime, this implies formation of quasi-one dimensional magnetic stripes orthogonal to the node axis. We also discuss the effects of a surface spin-mixing term coupling electrons from spin-degenerate Fermi arcs induced by a superconducting proximity pairing term","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:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/","og_locale":"fr_FR","og_type":"article","og_title":"Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan","og_description":"We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band\u00a0structure. By taking into account both bulk and surface contributions to the exchange interaction between the localized spins,we demonstrate that the surface contribution in general dominates the bulk one at distances larger than the inverse node separation due to a weaker power-law decay. We find a strong anisotropy of the surface term with respect to the spins being aligned along the node separation axis or perpendicular to it. In the many impurity dilute regime, this implies formation of quasi-one dimensional magnetic stripes orthogonal to the node axis. We also discuss the effects of a surface spin-mixing term coupling electrons from spin-degenerate Fermi arcs induced by a superconducting proximity pairing term","og_url":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/","og_site_name":"UNI FR","article_publisher":"https:\/\/www.facebook.com\/uni.lu","og_image":[{"width":2560,"height":2560,"url":"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2026\/03\/03120045\/UNIV_SM-Profile_1600x1600px-scaled.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Dur\u00e9e de lecture estim\u00e9e":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/","url":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/","name":"Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan - Universit\u00e9 du Luxembourg","isPartOf":{"@id":"https:\/\/www.uni.lu\/fr\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#primaryimage"},"image":{"@id":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#primaryimage"},"thumbnailUrl":"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2018\/11\/default-5.jpg","datePublished":"2018-11-26T10:58:09+00:00","dateModified":"2018-11-26T10:58:09+00:00","description":"We study the RKKY interaction between two magnetic impurities located on the surface of a three-dimensional Dirac semimetal with two Dirac nodes in the band\u00a0structure. By taking into account both bulk and surface contributions to the exchange interaction between the localized spins,we demonstrate that the surface contribution in general dominates the bulk one at distances larger than the inverse node separation due to a weaker power-law decay. We find a strong anisotropy of the surface term with respect to the spins being aligned along the node separation axis or perpendicular to it. In the many impurity dilute regime, this implies formation of quasi-one dimensional magnetic stripes orthogonal to the node axis. We also discuss the effects of a surface spin-mixing term coupling electrons from spin-degenerate Fermi arcs induced by a superconducting proximity pairing term","breadcrumb":{"@id":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#primaryimage","url":"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2018\/11\/default-5.jpg","contentUrl":"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2018\/11\/default-5.jpg","width":1500,"height":1125},{"@type":"BreadcrumbList","@id":"https:\/\/www.uni.lu\/fr\/events\/quantum-seminar-rkky-interaction-on-the-surface-of-3d-dirac-semimetals-by-vardan-kaladzhyan\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.uni.lu\/fr\/"},{"@type":"ListItem","position":2,"name":"Events","item":"https:\/\/www.uni.lu\/fr\/events\/"},{"@type":"ListItem","position":3,"name":"Quantum Seminar: RKKY interaction on the surface of 3D Dirac semimetals by Vardan Kaladzhyan"}]},{"@type":"WebSite","@id":"https:\/\/www.uni.lu\/fr\/#website","url":"https:\/\/www.uni.lu\/fr\/","name":"Uni.lu","description":"Universit\u00e9 du Luxembourg","publisher":{"@id":"https:\/\/www.uni.lu\/fr\/#organization"},"alternateName":"Universit\u00e9 du Luxembourg","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.uni.lu\/fr\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"fr-FR"},{"@type":"Organization","@id":"https:\/\/www.uni.lu\/fr\/#organization","name":"Universit\u00e9 du Luxembourg","alternateName":"Uni.lu","url":"https:\/\/www.uni.lu\/fr\/","logo":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.uni.lu\/fr\/#\/schema\/logo\/image\/","url":"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2026\/03\/03120045\/UNIV_SM-Profile_1600x1600px-scaled.jpg","contentUrl":"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2026\/03\/03120045\/UNIV_SM-Profile_1600x1600px-scaled.jpg","width":2560,"height":2560,"caption":"Universit\u00e9 du Luxembourg"},"image":{"@id":"https:\/\/www.uni.lu\/fr\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/uni.lu","https:\/\/www.linkedin.com\/school\/university-of-luxembourg\/","https:\/\/www.instagram.com\/uni.lu","https:\/\/www.youtube.com\/@uni_lu","https:\/\/en.wikipedia.org\/wiki\/University_of_Luxembourg"]}]}},"_links":{"self":[{"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/events\/7405"}],"collection":[{"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/events"}],"about":[{"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/types\/events"}],"replies":[{"embeddable":true,"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/comments?post=7405"}],"version-history":[{"count":0,"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/events\/7405\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/media\/7406"}],"wp:attachment":[{"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/media?parent=7405"}],"wp:term":[{"taxonomy":"events-topic","embeddable":true,"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/events-topic?post=7405"},{"taxonomy":"events-type","embeddable":true,"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/events-type?post=7405"},{"taxonomy":"organisation","embeddable":true,"href":"https:\/\/www.uni.lu\/fr\/wp-json\/wp\/v2\/organisation?post=7405"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}