Zone-Boundary Phonon Induced Mini Band Gap Formation in Graphene
Abstract
We investigate the effect of electron- phonon coupling on the gapless electronic band dispersion of the pristine graphene. The electron-phonon interaction is introduced through a Kekul\'{e}-type distortion giving rise to inter-valley scattering between K and K' points in graphene. We develop a Fr\"ohlich type Hamiltonian within the continuum model in the long wave length limit. By presenting a fully theoretical analysis, we show that the interaction of charge carriers with the highest frequency zone-boundary phonon mode of -symmetry induces a mini band gap at the corners of the two-dimensional Brillouin zone of the graphene. Since electron-electron interactions favor this type of lattice distortion, it is expected to be enhanced, and thus its quantitative implications might be measurable in graphene.
Keywords
Cite
@article{arxiv.1211.3528,
title = {Zone-Boundary Phonon Induced Mini Band Gap Formation in Graphene},
author = {B. S. Kandemir and A. Mogulkoc},
journal= {arXiv preprint arXiv:1211.3528},
year = {2013}
}