Journal
PHYSICAL REVIEW B
Volume 82, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.245418
Keywords
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Funding
- CSIC
- MICINN (Spain) [FIS2008-00124]
- U.S.-ONR-MURI
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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 n(imp) greater than or similar to n a finite density of states appears at the Dirac point, the one-particle lifetime no longer scales linearly with the Fermi momentum, and the line shapes 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.
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