Screening in Chiral Multilayer Graphene

ORAL

Abstract

We calculate the static polarization function of multilayer graphene and study the effects of stacking arrangement, carrier density and onsite energy difference. At low densities, the energy spectrum of multilayer graphene is described by a set of chiral two-dimensional electron systems and the associated chiral nature determines the screening properties of multilayer graphene showing very different behavior depending on whether chirality indices are even or odd. As the density increases, the energy spectrum follows that of monolayer graphene thus the polarization function approaches that of monolayer graphene.

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Authors

  • Hongki Min

    Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • E.H. Hwang

    CMTC, University of Maryland at College Park, Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA, Condensed Matter Theory Center, University of Maryland, College Park, MD

  • Sankar Das Sarma

    Department of Physics, University of Maryland, Condensed Matter Theory Center, Dept. of Physics, University of Maryland, Condensed Matter Theory Center, University of Maryland, College Park, Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, University of Maryland, College Park, Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, MD 20742, Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, Maryland 20742, USA, CMTC, UMD, College Park