A stable "flat" form of two-dimensional crystals: could graphene, silicene, germanene be minigap semiconductors?

Abstract

The discovery of a flat two-dimensional crystal known as graphene has contradicted Landau-Peierls-Mermin-Wagner arguments that there is no stable flat form of such crystals. Here, we show that the "flat" shape of graphene arises due to a microscopic buckling at the smallest possible interatomic scale. We show that the graphene, silicene, and other two… (More)
DOI: 10.1021/nl204283q

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