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