Charge-density-wave order parameter of the Falicov-Kimball model in infinite dimensions
Strongly Correlated Electrons
2009-11-10 v1 Statistical Mechanics
Abstract
In the large-U limit, the Falicov-Kimball model maps onto an effective Ising model, with an order parameter described by a BCS-like mean-field theory in infinite dimensions. In the small-U limit, van Dongen and Vollhardt showed that the order parameter assumes a strange non-BCS-like shape with a sharp reduction near T approx T_c/2. Here we numerically investigate the crossover between these two regimes and qualitatively determine the order parameter for a variety of different values of U. We find the overall behavior of the order parameter as a function of temperature to be quite anomalous.
Keywords
Cite
@article{arxiv.cond-mat/0306412,
title = {Charge-density-wave order parameter of the Falicov-Kimball model in infinite dimensions},
author = {Ling Chen and B. A. Jones and J. K. Freericks},
journal= {arXiv preprint arXiv:cond-mat/0306412},
year = {2009}
}
Comments
(5 pages, 3 figures, typeset with ReVTeX4)