First-principles study of electron linewidths in graphene.

Journal article

We present first-principles calculations of the linewidths of low-energy quasiparticles in n-doped graphene arising from both the electron-electron and the electron-phonon interactions. The contribution to the electron linewidth arising from the electron-electron interactions varies significantly with wave vector at fixed energy; in contrast, the electron-phonon contribution is virtually wave vector independent. These two contributions are comparable in magnitude at a binding energy of approximately 0.2 eV, corresponding to the optical phonon energy. The calculated linewidths, with both electron-electron and electron-phonon interactions included, explain to a large extent the linewidths seen in recent photoemission experiments.

Authors: Park, C; Giustino, F; Spataru, C; Cohen, M; Louie, S

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 102
• Issue: 7
• Pages: 076803
• Publication date: 2009-02-01
• DOI: 10.1103/physrevlett.102.076803
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English