Thermodynamics of the two-dimensional Falicov-Kimball model: a classical Monte Carlo study

Details Thermodynamics of the two-dimensional Falicov-Kimball model: a classical Monte Carlo study Thermodynamics of the two-dimensional Falicov-Kimball model: a classical Monte Carlo study

2005-04-20

arxiv.org/abs/cond-mat/0504533v2

Phys. Rev. B 74, 035109 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

15 pages, RevTeX

Scientific paper

10.1103/PhysRevB.74.035109

The two-dimensional Falicov-Kimball (FK) model is analyzed using Monte Carlo method. In the case of concentrations of both itinerant and localized particles equal to 0.5 we determine temperature dependence of specific heat, charge density wave susceptibility and density-density correlation function. In the weak interaction regime we find a first order transition to the ordered state and anomalous temperature dependence of the correlation function. We construct the phase diagram of half-filled FK model. Also, the role of next-nearest-neighbor hopping on the phase diagram is analyzed. Lastly, we discuss the density of states and the spectral functions for the mobile particles in weak and strong interaction regime.

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