|Title||Many-body exchange-correlation effects in graphene|
|Publication Type||Journal Article|
|Year of Publication||2008|
|Authors||E. H. Hwang, B Y-K. Hu, and S. Das Sarma|
|Journal||Physica E: Low-dimensional Systems and Nanostructures|
|Keywords||2008, Single Fellow|
We calculate, within the leading-order dynamical-screening approximation, the electron self-energy and spectral function at zero temperature for extrinsic (or gated/doped) graphene. We also calculate hot carrier inelastic scattering due to electron-electron interactions in graphene. We obtain the inelastic quasiparticle lifetimes and associated mean free paths from the calculated self-energy. The linear dispersion and chiral property of graphene gives energy dependent lifetimes that are qualitatively different from those of parabolic-band semiconductors.