{"id":6585,"date":"2018-02-20T17:39:48","date_gmt":"2018-02-20T16:39:48","guid":{"rendered":"https:\/\/www.uni.lu\/fr\/events\/simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain\/"},"modified":"2018-02-20T17:39:48","modified_gmt":"2018-02-20T16:39:48","slug":"simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain","status":"publish","type":"events","link":"https:\/\/www.uni.lu\/fr\/events\/simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain\/","title":{"rendered":"Simulating quantum transport through graphene: defects, edge roughness and strain"},"content":{"rendered":"<section class=\"wp-block-unilux-blocks-free-section section\"><div class=\"container xl:max-w-screen-xl\"><p><strong>About the topic<\/strong><\/p><p>The special properties of graphene have created wide interest in possible graphene-based nanoelectronic devices. A theoretical understanding of the electronic structure of graphene in different chemical environments, and ways to tailor them, are crucial for future device applications. We investigate transport through nanostructured graphene using tight binding. Density functional theory calculations in combination with Wannier projections allow for quantitatively accurate tight binding parameters to simulate defects. We account for elastic scattering at defects as well as inelastic scattering at phonons. <\/p><p>The properties of lithographically patterned graphene nanoconstrictions are dominated by the edge roughness induced by the device fabrication process. Coulomb blockade measurements with our simulations reveals defect states that strongly localize at the rough constriction edge [1]. Sandwiching graphene between layers of hexagonal boron nitride protects the material against chemical residuals of the etching chemistry, allowing for the\u00a0 experimental observations of finite size effects [2]. Indeed, experiment and theory agree very well, allowing for quantitative assessment of the residual disorder strength. To demonstrate the unique symmetry properties of graphene requires dot geometries without physical edges. We combine a magnetic field with the tip of a scanning tunneling microscope to create a smooth confinement. The resulting potential well allows for localizing states in the Landau gaps of bulk graphene [3]. Such devices open<\/p><p>a pathway towards applications of graphene in quantum information technologies.<\/p><p>\u00a0<\/p><p>[1] D. Bischoff et al., Appl. Phys. Lett. 107, 203107 (2015)<\/p><p>[2] B. Terres et al., Nature Comm. 7, 11528 (2016)<\/p><p>[3] N. Freitag et al., Nano Lett. 16, 5798 (2016).<\/p><\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":0,"featured_media":6586,"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":"2018-02-21 11:00:00","event_end_date":"2018-02-21 13:00:00","event_speaker_name":"Prof. Florian Libisch, Institute for Theoretical Physics, Vienna University of Technology","event_speaker_link":"","event_is_online":false,"event_location":"Campus Limpertsberg - Room BSC \u2013 E015","event_street":"","event_location_link":"","event_zip_code":"","event_city":"","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>Simulating quantum transport through graphene: defects, edge roughness and strain - Universit\u00e9 du Luxembourg<\/title>\n<meta name=\"description\" content=\"About the topicThe special properties of graphene have created wide interest in possible graphene-based nanoelectronic devices. A theoretical\" \/>\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\/simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Simulating quantum transport through graphene: defects, edge roughness and strain\" \/>\n<meta property=\"og:description\" content=\"About the topicThe special properties of graphene have created wide interest in possible graphene-based nanoelectronic devices. A theoretical\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.uni.lu\/fr\/events\/simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain\/\" \/>\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\/simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain\/\",\"url\":\"https:\/\/www.uni.lu\/fr\/events\/simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain\/\",\"name\":\"Simulating quantum transport through graphene: defects, edge roughness and strain - Universit\u00e9 du Luxembourg\",\"isPartOf\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/events\/simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.uni.lu\/fr\/events\/simulating-quantum-transport-through-graphene-defects-edge-roughness-and-strain\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/11\/2018\/02\/simulating_quantum_transport_through_graphene_defects_edge_roughness_and_strain.jpg\",\"datePublished\":\"2018-02-20T16:39:48+00:00\",\"dateModified\":\"2018-02-20T16:39:48+00:00\",\"description\":\"About the topicThe special properties of graphene have created wide interest in possible graphene-based nanoelectronic devices. 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