Densities of states of the Falicov-Kimball model off half filling in infinite dimensions
arXiv:cond-mat/0502669 · doi:10.1103/PhysRevB.72.045134
Abstract
An approximate analytical scheme of the dynamical mean field theory (DMFT) is developed for the description of the electron (ion) lattice systems with Hubbard correlations within the asymmetric Hubbard model where the chemical potentials and electron transfer parameters depend on an electron spin (a sort of ions). Considering a complexity of the problem we test the approximation in the limiting case of the infinite- spinless Falicov-Kimball model. Despite the fact that the Falicov-Kimball model can be solved exactly within DMFT, the densities of states of localized particles have not been completely investigated off half filling. We use the approximation to obtain the spectra of localized particles for various particle concentrations (chemical potentials) and temperatures. The effect of a phase separation phenomenon on the spectral function is considered.
arXiv comment9 pages, 11 figures, submitted to Phys. Rev. B
References in corpus (12)
- Exact solution of the Falicov-Kimball model with dynamical mean-field theory
- The Hubbard Model at Infinite Dimensions: Thermodynamic and Transport Properties
- Correlation Induced Insulator to Metal Transitions
- Magnetism and Phase Separation in the Ground State of the Hubbard Model
- Ferromagnetism in the large-U Hubbard model
- The moment sum rule and its consequences for ferromagnetism in the Hubbard model
- Exact solution of the multi-component Falicov-Kimball model in infinite dimensions
- Phase separation and the segregation principle in the infinite-U spinless Falicov-Kimball model
- Segregation in the asymmetric Hubbard model
- The Numerical Renormalization Group Method for correlated electrons
- Optimization of alloy-analogy-based approaches to the infinite-dimensional Hubbard model
- Green's functions of infinite-U asymmetric Hubbard model: Falicov-Kimball limit