Electronic polarons in an extended Falicov-Kimball model
arXiv:cond-mat/0502030 · doi:10.1209/epl/i2005-10509-0
Abstract
We examine the one-dimensional spinless Falicov-Kimball model extended by a hybridization potential between the localized and itinerant electron states. Below half-filling we find a crossover from a mixed-valence metal to an integer-valence phase separated state with increasing on-site Coulomb repulsion. This crossover regime is characterized by local competition between the strong- and weak-coupling behaviour, manifested by the formation of an electronic polaron liquid. We identify this intermediate-coupling regime as a charge-analogy of the Griffiths phase; a phase diagram is presented and discussed in detail.
arXiv commentRevTex, 10 pages, 1 figure; revised discussion
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