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CALSCALE:GREGORIAN
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X-ORIGINAL-URL:https://ktfa.science.upjs.sk/
X-WR-CALNAME:Department of Theoretical Physics and Astrophysics
X-WR-CALDESC:Pavol Jozef Šafárik University in Košice
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-PUBLISHED-TTL:PT1H
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BEGIN:VEVENT
CLASS:PUBLIC
UID:MEC-d8994f945bb0a0217ab9d19a0d416581@ktfa.science.upjs.sk
DTSTART:20230511T113000Z
DTEND:20230511T130000Z
DTSTAMP:20230509T091400Z
CREATED:20230509
LAST-MODIFIED:20230509
PRIORITY:5
TRANSP:OPAQUE
SUMMARY:Twist-angle dependent proximity induced spin-orbit coupling in graphene/transition-metal dichalcogenide and graphene/topological insulator heterostructures
DESCRIPTION:Thomas Naimer\nInstitute for Theoretical Physics, University of Regensburg, 93053 Regensburg, Germany\nWe investigate the proximity-induced spin-orbit coupling in twisted heterostructures of graphene/transition-metal dichalcogenides (MoS2, WS2, MoSe2, and WSe2) as well as graphene/topological insulators (Bi2Se3 and Bi2Te3) from first principles. The band structures of serveral supercells are fitted around the Dirac point to an established spin-orbit Hamiltonian, yielding the twist angle dependencies of the spin-orbit couplings. While for most structures a mix of Rashba and valley-Zeeman spin-orbit coupling is present, we also witness the emergence of Kane-Mele spin-orbit coupling in graphene/topological insulator structures at 30° twist angle. Additionally, for twisted supercells we observe a radial component of the in-plane spin structure around the Dirac cone, which can be used to induce collinear charge-to-spin conversion.\nhost: Martin Gmitra\n
URL:https://ktfa.science.upjs.sk/events/twist-angle-dependent-proximity-induced-spin-orbit-coupling-in-graphene-transition-metal-dichalcogenide-and-graphene-topological-insulator-heterostructures/
CATEGORIES:KTFA seminar
LOCATION:Park Angelinum 9, Kosice
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