Dynamical susceptibilities in strong coupling approach

Details Dynamical susceptibilities in strong coupling approach Dynamical susceptibilities in strong coupling approach

1999-12-16

arxiv.org/abs/cond-mat/9912300v2

Physica C: Superconductivity, Vol. 341-348 (1-4) (2000) pp. 177-178

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 3 eps figures, final version published in proceedings of M2S-HTSC-VI (Houston)

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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