Dynamical susceptibilities in strong coupling approach: General scheme and Falikov-Kimball model

Details Dynamical susceptibilities in strong coupling approach: General scheme and Falikov-Kimball model Dynamical susceptibilities in strong coupling approach: General scheme and Falikov-Kimball model

2002-03-24

arxiv.org/abs/cond-mat/0203492v1

J. Phys. Studies 5, 349 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, lecture given at the 2nd International Pamporovo Workshop on Cooperative Phenomena in Condensed Matter (28th July - 7

Scientific paper

A general scheme to calculate dynamical susceptibilities of strongly correlated electron systems within the dynamical mean field theory is developed. Approach is based on an expansion over electron hopping around the atomic limit (within the diagrammatic technique for site operators: projection and Hubbard ones) in infinite dimensions. As an example, the Falicov-Kimball and simplified pseudospin-electron models are considered for which an analytical expressions for dynamical susceptibilities are obtained.

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