Friedel oscillations, impurity scattering and temperature dependence of resistivity in graphene

Details Friedel oscillations, impurity scattering and temperature dependence of resistivity in graphene Friedel oscillations, impurity scattering and temperature dependence of resistivity in graphene

2006-08-10

arxiv.org/abs/cond-mat/0608228v2

PRL 97, 226801 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages LaTeX; a note added in conclusions concerning the RKKY interaction

Scientific paper

10.1103/PhysRevLett.97.226801

We show that Friedel oscillations (FO) in grapehene are strongly affected by the chirality of electrons in this material. In particular, the FO of the charge density around an impurity show a faster, $1/r^3$, decay than in conventional 2D electron systems and do not contribute to a linear temperature-dependent correction to the resistivity. In contrast, the FO of the exchange field which surrounds atomically sharp defects breaking the hexagonal symmetry of the honeycomb lattice lead to a negative linear T dependence of the resistivity.

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