First Principles Analysis of Electron-Phonon Interaction in Graphene

Details First Principles Analysis of Electron-Phonon Interaction in Graphene First Principles Analysis of Electron-Phonon Interaction in Graphene

2009-12-03

arxiv.org/abs/0912.0562v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 4 figures

Scientific paper

The electron-phonon interaction in monolayer graphene is investigated by using density functional perturbation theory. The results indicate that the electron-phonon interaction strength is of comparable magnitude for all four in-plane phonon branches and must be considered simultaneously. Moreover, the calculated scattering rates suggest an acoustic phonon contribution that is much weaker than previously thought, revealing the role of optical phonons even at low energies. Accordingly it is predicted, in good agreement with a recent measurement, that the intrinsic mobility of graphene may be more than an order of magnitude larger than the high values reported in suspended samples.

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