The role of coulomb interactions in valence transition: Falicov_Kimball model
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Date
1984
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Publisher
American Institute of Physics
Abstract
A nonperturbative method of Green function calculation is applied to the Falicov_Kimball model Hamiltonian. In an approximation to first order in the hopping matrix elements, self_consistent solutions for several thermal averages and correlation functions do not show abrupt phase changes as a function of temperature. This treatment suggests that the Coulomb correlation by itself is not the key ingredient to understanding valence transitions.
Description
Keywords
Correlation functions, Green's function methods, Nonperturbative techniques, Phase transitions
Citation
Bowen, S. P., Lady, S. C. (1984). The role of coulomb interactions in valence transition: Falicov_Kimball model. Journal of Applied Physics, 55(6), 1925-1927. doi: 10.1063/1.333520