Electron-electron interactions in the conductivity of graphene
arXiv:1004.0468 · doi:10.1103/PhysRevB.82.075424
Abstract
The effect of electron-electron interaction on the low-temperature conductivity of graphene is investigated experimentally. Unlike in other two-dimensional systems, the electron-electron interaction correction in graphene is sensitive to the details of disorder. A new temperature regime of the interaction correction is observed where quantum interference is suppressed by intra-valley scattering. We determine the value of the interaction parameter, F_0 ~ -0.1, and show that its small value is due to the chiral nature of interacting electrons.
4 pages, 4 figures, 1 table