Phase transitions induced by correlated hopping.: In the Falicov-Kimball model

extrapolation of finite-cluster calculations is used to examine ground-state properties of the one-dimensional Falicov-Kimball model with correlated hopping. It is shown that the correlated hopping strongly influences both the valence transitions and the conducting properties of the model and so it should not be neglected in the correct description of materials with correlated electrons. This is illustrated for two selected values of the Coulomb interaction that represent typical behavior of the model for small and intermediate (strong) interactions. In both cases the insulator-metal transitions (accompanied by continuous or discontinuous valence transitions) induced by correlated hopping are observed.