Correlated hopping in infinite dimensions: rigorous local approach
Abstract
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.
- Publication:
-
Physica Status Solidi B Basic Research
- Pub Date:
- March 2003
- DOI:
- 10.1002/pssb.200301681
- arXiv:
- arXiv:cond-mat/0205265
- Bibcode:
- 2003PSSBR.236..368S
- Keywords:
-
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 4 pages, 2 figures, submitted to the proceedings of the European Conference Physics Of Magnetism '02, July 1-5, 2002, Poznan, POLAND