Phase separation in the strongly correlated Falicov-Kimball model in infinite dimensions
Institute of Metal Physics, Ural Division of Russian Academy of Sciences, Kovalevskaya
str. 18, Yekaterinburg,
Revised: 12 April 1999
Published online: 15 October 1999
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 of the localized electrons is equal to zero. Electron-poor regions always have homogeneous state and electron-rich regions have chessboard state for , chessboard state or homogeneous state in dependence upon temperature for and homogeneous state for . For and T=0, phase separation (segregation) occurs at . The obtained results are exact for the Bethe lattice with infinite number of the nearest neighbours.
PACS: 71.10.Fd – Lattice fermion models (Hubbard model, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999