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.
*The work is supported by ONR-MURI and NRI-SWAN.
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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
