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arXiv · 0706.2490

Electron scattering on microscopic corrugations in graphene

M. I. Katsnelson·A. K. Geim
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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.

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M. I. Katsnelson, A. K. Geim. 2007-09-11. Electron scattering on microscopic corrugations in graphene. https://doi.org/10.1098/rsta.2007.2157

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