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Charge density excitations in bilayer graphene in high magnetic field
Authors:V. E. Bisti  N. N. Kirova
Affiliation:1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, 142432, Russia
2. LPS, Bat. 100, Universite Paris Sud, 91406, Orsay Cedex, France
Abstract:The charge-density excitations in bilayer graphene at the filling-factor ν ></img>                                </span>                              </span> 1 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 <span class= $ sqrt H $ for the symmetric case with half-filled zero-energy levels is found both for bilayer and monolayer graphene.
Keywords:
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