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VOLUME 90 (2009) | ISSUE 2 | PAGE 130
Charge density excitations in bilayer graphene in high magnetic field
PACS: 73.22.Lp, 73.43.Lp, 76.40.+b, 78.66.Tr
Abstract
The charge-density excitations in bilayer graphene at the filling-factor \nu \ll1 at small momenta are considered in the frame of the Hartree-Fock approximation. The presence of small asymmetry of graphene layers is included. The dependence of the magnetoplasmon energy on the bilayer ground state is shown. The energy splitting proportional to \sqrt{H} for the symmetric case with half-filled zero-energy levels is found both for bilayer and monolayer graphene.