A. A. Kozikov, A. K. Savchenko, B. N. Narozhny, A. V. Shytov
Published 2010-04-03, updated 2010-05-26Version 2
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.
Comments: 4 pages, 4 figures, 1 table
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