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Correlated hopping in infinite dimensions: rigorous local approach
Author(s) -
Shvaika A. M.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301681
Subject(s) - limiting , physics , citation , limit (mathematics) , field (mathematics) , statistical physics , library science , mathematics , computer science , pure mathematics , mathematical analysis , mechanical engineering , engineering
A general approach for the description of correlated hopping in the dynamical mean‐field theory, which is based on the expansion over electron hopping around the atomic limit, is developed. It is formulated in terms of the local irreducible parts (cumulants) of Green's functions and allows to calculate thermodynamical functions. As a limiting case the Falicov–Kimball model with correlated hopping is considered.