  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.
