Nonequilibrium excitations and transport of Dirac electrons in electric-field-driven graphene

  title={Nonequilibrium excitations and transport of Dirac electrons in electric-field-driven graphene},
  author={Jiajun Li and Jong E. Han},
  journal={Physical Review B},
We investigate nonequilibrium excitations and charge transport in charge-neutral graphene driven with DC electric field by using the nonequilibrium Green's function technique. Due to the vanishing Fermi surface, electrons are subject to non-trivial nonequilibrium excitations such as highly anisotropic momentum distribution of electron-hole pairs, an analog of the Schwinger effect. We show that the electron-hole excitations, initiated by the Landau-Zener tunneling with a superlinear IV relation… Expand
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