期刊
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
卷 244, 期 11, 页码 4112-4117出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.200776105
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The low-energy electronic band structure of bilayer graphene consists of four bands: a pair of bands split from zero energy by the interlayer coupling and a pair of bands which touch at zero energy in a nominally undoped system. The latter support massive, chiral quasiparticles with a parabolic dispersion and Berry phase 2 pi. Asymmetry between the potential energies of the layers opens a tuneable gap between the conduction and valence bands. A self-consistent Hartree approximation is used to model the control of such an interlayer asymmetry gap induced by a transverse electric field in a graphene-based field-effect transistor. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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