Phase separation in the strongly correlated Falicov-Kimball model in infinite dimensions

B. Letfulov ()

The European Physical Journal B: Condensed Matter and Complex Systems, 1999, vol. 11, issue 3, 423-428

Abstract: Phase separation in the strongly correlated Falicov-Kimball model in infinite dimensions is examined. We show that the phase separation can occur for any values of the interaction constant J * when the site energy ε 0 of the localized electrons is equal to zero. Electron-poor regions always have homogeneous state and electron-rich regions have chessboard state for J 0 ≥ 0.03, chessboard state or homogeneous state in dependence upon temperature for 0 > J * > 0.03 and homogeneous state for J * =0. For J * =0 and T=0, phase separation (segregation) occurs at −1 > ε 0 > 0. The obtained results are exact for the Bethe lattice with infinite number of the nearest neighbours. Copyright Società Italiana di Fisica, Springer-Verlag 1999

Keywords: PACS. 71.10.Fd Lattice fermion models (Hubbard model; etc.) (search for similar items in EconPapers)
Date: 1999
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DOI: 10.1007/s100510050952

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