Electron scattering on microscopic corrugations in graphene
Abstract
We discuss various scattering mechanisms for Dirac fermions in single-layer graphene. It is shown that scattering on a short-range potential (due to, for example, neutral impurities) is mostly irrelevant for electronic quality of graphene, which is likely to be controlled by charged impurities and ripples (microscopic corrugations of a graphene sheet). The latter are an inherent feature of graphene due to its two-dimensional nature and can also be an important factor in defining the electron mean free path. We show that certain types of ripples create a long-range scattering potential, similar to Coulomb scatterers, and result in charge-carrier mobility practically independent on carrier concentration, in agreement with experimental observations.
Cite
@article{arxiv.0706.2490,
title = {Electron scattering on microscopic corrugations in graphene},
author = {M. I. Katsnelson and A. K. Geim},
journal= {arXiv preprint arXiv:0706.2490},
year = {2007}
}