Many-body exchange-correlation effects in graphene

作者：Hwang E H^*; Hu Ben Yu Kuang; Das Sarma S

来源：Physica E: Low-Dimensional Systems and Nanostructures , 2008, 40(5): 1653-1655.

DOI：10.1016/j.physe.2007.10.043

• graphene
• self-energy
• quasiparticle properties
• RPA

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 give energy dependent lifetimes that are qualitatively different from those of parabolic-band semiconductors.

• 出版日期2008-3