We develop a theory for the electron-phonon interaction effects on the electronic properties of graphene. We analytically calculate the electron self-energy, spectral function and band velocity renormalization due to phonon-mediated electron-electron interaction. We find that phonon-mediated electron-electron coupling has a large effect on the graphene band structure renormalization, and our analytic theory successfully captures the essential features of the observed graphene electron spectra in the ARPES experiments, predicting a kink at ∼200meV below the Fermi level and a reduction of the band velocity by ∼10−20 at the experimental doping level.
@article{arxiv.0707.3651,
title = {Phonon-induced many-body renormalization of graphene electronic properties},
author = {Wang-Kong Tse and S. Das Sarma},
journal= {arXiv preprint arXiv:0707.3651},
year = {2009}
}
Comments
Minor typo in the vertical-axis label of Fig. 1 corrected; accepted version in PRL (in press)