Abstract
In this investigation we present exact results on the spin-1/2 Falicov-Kimball model. We obtain ground-state results for arbitrary dimensions using the method of in-equalities as well as results on the thermodynamics for large dimensions. As a new feature (not possible in a spinless model) we obtain a transition (which may be discontinuous) into a new state with a high density of pairs of thef-electrons.
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Supported in part by the Deutsche Forschungsgemeinschaft
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Brandt, U., Fledderjohann, A. & Hülsenbeck, G. New phase in a spin-1/2 Falicov-Kimball model. Z. Physik B - Condensed Matter 81, 409–416 (1990). https://doi.org/10.1007/BF01390822
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DOI: https://doi.org/10.1007/BF01390822