Hubbard fermions band splitting at the strong intersite Coulomb interaction

The effect of the strong intersite Coulomb correlations on the formation of the electron structure of the t-V-model has been studied. A qualitatively new result has been obtained which consists in the occurrence of a split-off band of the Fermi states. The spectral intensity of this band increases w...

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Bibliographic Details
Published in:arXiv.org 2009-11
Main Authors: Val'kov, Valery V, Korovushkin, Maxim M
Format: Article
Language:English
Subjects:
Electron density
Electronic structure
Fermions
Variations
Online Access:Get full text
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Summary:The effect of the strong intersite Coulomb correlations on the formation of the electron structure of the t-V-model has been studied. A qualitatively new result has been obtained which consists in the occurrence of a split-off band of the Fermi states. The spectral intensity of this band increases with the enhancement of a doping level and is determined by the mean-square fluctuation of the occupation numbers. This leads to the qualitative change in the structure of the electron density of states.
ISSN:2331-8422