Interplay of Coulomb interactions and rippling of monolayer graphene: RG approach

ORAL

Abstract

The effects of electron-electron Coulomb interactions and rippling disorder of a mono-layer graphene are studied at half-filling using renormalization group. It is found that the system flows to an infra-red stable line of fixed points which is accessible perturbatively and along which the zero temperature minimal metallic conductivity is non-universal and enhanced relative to the clean non-interacting fixed point. An estimate of the typical random vector potential representing ripples in graphene brings the theoretical value of the minimal conductivity into the vicinity of $4e^2/h$.

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Authors

  • Oskar Vafek

    • National High Magnetic Field Laboratory and Department of Physics, Florida State University, USA
    • NHMFL and FSU
    • National High Magnetic Field Lab and Florida State University

  • Vladimir Juricic

    • Department of Physics, Simon Fraser University, Canada
    • Simon Fraser University

  • Igor Herbut

    • Simon Fraser University
    • Department of Physics, Simon Fraser University, Canada