Perturbation theory for a hamiltonian linear in quasimomentum

被引：0
作者：
L. A. Falkovsky
机构：
[1] Russian Academy of Sciences,Landau Institute for Theoretical Physics
[2] Russian Academy of Sciences,Vereshchagin Institute for High Pressure Physics
来源：
JETP Letters | 2012年 / 94卷
关键词：
Perturbation Theory; Fermi Surface; Brillouin Zone; JETP Letter; Graphene Bilayer;
D O I：
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学科分类号：
摘要：
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.
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页码：723 / 727
页数：4
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