Nonequilibrium dynamical cluster approximation study of the Falicov-Kimball model
نویسندگان
چکیده
منابع مشابه
Dynamical charge susceptibility of the spinless Falicov-Kimball model
An exact solution is presented for the frequency-dependent charge susceptibility of the spinless FalicovKimball model by using dynamical mean-field theory. We develop a nontrivial application of the BaymKadanoff ‘‘conserving approximation’’ formalism to exactly determine the frequency-dependent vertex function ~which turns out to assume a particularly simple form!. We show how the static and dy...
متن کاملFalicov - Kimball Model
The “Falicov-Kimball model” was first considered by Hubbard and Gutzwiller in 1963– 65 as a simplification of the Hubbard model. Falicov and Kimball introduced in 1969 a model that included a few extra complications, in order to investigate metal-insulator phase transitions in rare-earth materials and transition-metal compounds. Experimental data suggested that this transition is due to the int...
متن کاملLocal approximation to the spinless Falicov-Kimball model.
The local approximation is applied to the spinless Falicov-Kimball model in one and two dimensions. The local approximation may be viewed as a zeroth-order expansion in 1=d that is exact in the weak-coupling limit. The local approximation rapidly becomes innacurate as a function of interaction strength in one dimension, but is accurate in two dimensions. This result indicates that the 1=d expan...
متن کاملBosonization solution of the Falicov-Kimball model.
We use a novel approach to analyze the one-dimensional spinless Falicov-Kimball model. We derive a simple effective model for the occupation of the localized orbitals which clearly reveals the origin of the known ordering. Our study is extended to a quantum model with hybridization between the localized and itinerant states: We find a crossover between the well-known weak- and strong-coupling b...
متن کاملSegregation in the Falicov-kimball Model
The Falicov-Kimball model is a simple quantum lattice model that describes light and heavy electrons interacting with an on-site repulsion; alternatively, it is a model of itinerant electrons and fixed nuclei. It can be seen as a simplification of the Hubbard model; by neglecting the kinetic (hopping) energy of the spin up particles, one gets the Falicov-Kimball model. We show that away from ha...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2016
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.94.245114