Work

Velocity Renormalization and Carrier Lifetime in Graphene from the Electron-Phonon Interaction

Year: 2007

Type: article

Abstract: We present a first-principles investigation of the phonon-induced electron self-energy in graphene. The energy dependence of the self-energy reflects the peculiar linear band structure of graphene and deviates substantially from the usual metallic behavior. The effective band velocity of the Dirac fermions is found to be reduced by 4%-8%, depending on doping, by the interaction with lattice vibrations. Our results are consistent with the observed linear dependence of the electronic linewidth on the binding energy in photoemission spectra.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.99.086804

Authors: Cheol-Hwan Park, Feliciano Giustino, Marvin L. Cohen, Steven G. Louie

Institutions: Lawrence Berkeley National Laboratory, University of California, Berkeley

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green