Electron Hole Asymmetry in Graphene Coupled to an SiO2 Substrate

ORAL

Abstract

The conductance of graphene generally exhibits an asymmetry in the electron and hole branches. We propose a contribution to this asymmetry that is based upon the coupling between the graphene and an SiO2 substrate. Treating the coupling in the tight-binding approximation, we calculate an exact Green's function for the coupled graphene/SiO2 system.

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Authors

  • Robert Higginbotham

    • University of Notre Dame

  • Nan Sun

  • Gerald Arnold

  • Steven Ruggiero