Numerical studies of conductivity and Fano factor in disordered graphene

    Authors

    C. H. Lewenkopf; E. R. Mucciolo;A. H. Castro Neto

    Comments

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    Abbreviated Journal Title

    Phys. Rev. B

    Keywords

    SHOT-NOISE; Physics, Condensed Matter

    Abstract

    Using the recursive Green's function method, we study the problem of electron transport in a disordered single-layer graphene sheet. The conductivity is of order e(2)/h and its dependence on the carrier density has a scaling form that is controlled solely by the disorder strength and the ratio between the sample size and the correlation length of the disorder potential. The shot noise Fano factor is shown to be nearly density independent for sufficiently strong disorder, with a narrow structure appearing at the neutrality point only for weakly disordered samples. Our results are in good agreement with experiments and provide a way for extracting microscopic information about the magnitude of extrinsic disorder in graphene.

    Journal Title

    Physical Review B

    Volume

    77

    Issue/Number

    8

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    4

    WOS Identifier

    WOS:000253764300015

    ISSN

    1098-0121

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