Ground-state properties of multicomponent Falicov–Kimball-like models I

Janusz Jȩdrzejewski and Volodymyr Derzhko

Physica A: Statistical Mechanics and its Applications, 2003, vol. 317, issue 1, 227-238

Abstract: We consider a classical lattice gas that consists of more than one “species” of particles (like a spin-32 Ising model or the atomic limit of the extended Hubbard model), whose ground-state phase diagram is macroscopically degenerate. This gas is coupled component-wise and in the Falicov–Kimball-like manner to a multicomponent free-fermion gas. We show rigorously that a component-wise coupling of the classical subsystem to the quantum one orders the classical subsystem so that the macroscopic degeneracy is removed.

Keywords: Fermion lattice systems; Ground-state phase diagrams; Strongly correlated electrons; Falicov–Kimball model; Extended Hubbard model (search for similar items in EconPapers)
Date: 2003
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:317:y:2003:i:1:p:227-238

DOI: 10.1016/S0378-4371(02)01326-2

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