RSS icon
Twitter icon
Facebook icon
Vimeo icon
YouTube icon

Many-body exchange-correlation effects in graphene

TitleMany-body exchange-correlation effects in graphene
Publication TypeJournal Article
Year of Publication2008
AuthorsE. H. Hwang, B Y-K. Hu, and S. Das Sarma
JournalPhysica E: Low-dimensional Systems and Nanostructures
Date Publishedmar
Keywords2008, 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.