Scattering of electrons by clusters of charged impurities in graphene

Details Scattering of electrons by clusters of charged impurities in graphene Scattering of electrons by clusters of charged impurities in graphene

2009-01-10

arxiv.org/abs/0901.1398v2

Phys. Rev. B vol. 79, 195426 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

It is shown that clustering of charged impurities on graphene can suppress their contribution to the resistivity by a large factor of about the number of impurities per cluster, while leaving the density dependence unchanged. If the cluster size is large in comparison with the Fermi wavelength, the scattering cross section shows sharp resonances as a function of incident angle and electron wavevector. In this regime, due to dominant contribution of scattering by small angles, the transport cross section can be much smaller than the quantum one, which can be verified experimentally by comparing the Dingle temperature and the electron mean free path.

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