• 文献标题:   Spectral and optical properties of doped graphene with charged impurities in the self-consistent Born approximation
  • 文献类型:   Article
  • 作  者:   DE JUAN F, HWANG EH, VOZMEDIANO MAH
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121 EI 1550-235X
  • 通讯作者地址:   CSIC
  • 被引频次:   7
  • DOI:   10.1103/PhysRevB.82.245418
  • 出版年:   2010

▎ 摘  要

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.