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Updated: Jul 18, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Friedel oscillations, impurity scattering, and temperature dependence of resistivity in graphene
Vadim V Cheianov1, Vladimir I Fal'ko
1Physics Department, Lancaster University, Lancaster, LA1 4YB, United Kingdom.
Abstract:
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 (deltarho approximately 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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