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JETP Letters

, Volume 94, Issue 9, pp 723–727 | Cite as

Perturbation theory for a hamiltonian linear in quasimomentum

  • L. A. Falkovsky
Methods of Theoretical Physics

Abstract

Perturbation theory has been proposed to take into account small terms in the multiband Hamiltonian, which lead to significant changes such as the trigonal warping of the Fermi surface. The theory is similar to the “cross technique” and is reduced to the self-energy corrections to the matrix Green’s function. A particular application to graphite and a graphene bilayer has been given.

Keywords

Perturbation Theory Fermi Surface Brillouin Zone JETP Letter Graphene Bilayer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • L. A. Falkovsky
    • 1
  1. 1.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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