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Title: Quantum spin Hall states in graphene interacting with WS{sub 2} or WSe{sub 2}

In the framework of first-principles calculations, we investigate the structural and electronic properties of graphene in contact with as well as sandwiched between WS{sub 2} and WSe{sub 2} monolayers. We report the modification of the band characteristics due to the interaction at the interface and demonstrate that the presence of the dichalcogenide results in quantum spin Hall states in the absence of a magnetic field.
Authors:
;  [1] ; ;  [2]
  1. Physical Science and Engineering Division, KAUST, Thuwal 23955-6900 (Saudi Arabia)
  2. Bremen Center for Computational Materials Science, University of Bremen, Am Falturm 1, 28359 Bremen (Germany)
Publication Date:
OSTI Identifier:
22395498
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRONIC STRUCTURE; GRAPHENE; HALL EFFECT; INTERFACES; MAGNETIC FIELDS; MODIFICATIONS; SPIN; TUNGSTEN SULFIDES