Quantum transport at the Dirac point and Klein tunneling in disordered graphene

ORAL

Abstract

We describe a robust method to obtain transport properties at the Dirac point in disordered graphene that uniquely combines three crucial features: 1) fully quantum mechanical calculation of transport properties using the transfer matrix approach, 2) a microscopic treatment of the effects of charged disorder with the self-consistent Thomas-Fermi-Dirac density functional method, and 3) the ability to treat experimentally relevant system sizes. As an application we discuss the effects of disorder on Klein tunneling in p-n-p junctions.

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Authors

  • Jens H. Bardarson

    Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720

  • Enrico Rossi

    University of Maryland, Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, CMTC, Department of Physics, University of Maryland

  • P.W. Brouwer

    Dahlem Center for Complex Quantum Systems, Freie Universitaet Berlin, Dahlem Center for Complex Quantum Systems and Institut fur Theoretische Physik, Freie Universitat Berlin, Arnimallee 14, 14195 Berlin, Germany

  • S. Das Sarma

    University of Maryland, Condensed Matter Theory Center and Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, MD 20742, Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland, USA, University of Maryland, College Park, University of Maryland-College Park, Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park MD 20742-4111, Univ. of Maryland, University of Maryland, College Park, Maryland, USA, Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742-4111