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

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

2002-05-27

arxiv.org/abs/cond-mat/0205548v3

Physica A 317 (2003) 227-238

Physics

Condensed Matter

Statistical Mechanics

14 pages, 1 figure

Scientific paper

10.1016/S0378-4371(02)01326-2

We consider a classical lattice gas that consists of more than one "species" of particles (like a spin-3/2 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.

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