Spectral and optical properties of doped graphene with charged impurities in the self-consistent Born approximation
arXiv:1009.2512 · doi:10.1103/PhysRevB.82.245418
Abstract
Spectral and transport properties of doped (or gated) graphene with long range charged impurities are discussed within the self-consistent Born approximation. It is shown how, for impurity concentrations a finite DOS appears at the Dirac point, the one-particle lifetime no longer scales linearly with the Fermi momentum, and the lineshapes in the spectral function become non-lorentzian. These behaviors are different from the results calculated within the Born approximation. We also calculate the optical conductivity from the Kubo formula by using the self-consistently calculated spectral function in the presence of charged impurities.
Minor typos corrected, journal ref. added
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