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      Quantum Spin Hall Effect in Graphene

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          Abstract

          We study the effects of spin orbit interactions on the low energy electronic structure of a single plane of graphene. We find that in an experimentally accessible low temperature regime the symmetry allowed spin orbit potential converts graphene from an ideal two dimensional semimetallic state to a quantum spin Hall insulator. This novel electronic state of matter is gapped in the bulk and supports the quantized transport of spin and charge in gapless edge states that propagate at the sample boundaries. The edge states are non chiral, but they are insensitive to disorder because their directionality is correlated with spin. The spin and charge conductances in these edge states are calculated and the effects of temperature, chemical potential, Rashba coupling, disorder and symmetry breaking fields are discussed.

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          Author and article information

          Journal
          29 November 2004
          2005-11-23
          Article
          10.1103/PhysRevLett.95.226801
          cond-mat/0411737
          Custom metadata
          Phys. Rev. Lett. 95, 226801 (2005)
          4 pages, published version
          cond-mat.mes-hall

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