Quantum spin Hall states in graphene interacting with WS2_2 or WSe2_2

preprint2014arXivOpen access

Abstract

In the framework of first-principles calculations, we investigate the structural and electronic properties of graphene in contact with as well as sandwiched between WS2_2 and WSe2_2 monolayers. We report the modification of the band characteristics due to the interaction at the interface and demonstrate that the presence of the dichalcogenides results in quantum spin Hall states in the absence of a magnetic field.

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