The influence of correlated hopping on valence and metal-insulator transitions in the Falicov-Kimball model

Details The influence of correlated hopping on valence and metal-insulator transitions in the Falicov-Kimball model The influence of correlated hopping on valence and metal-insulator transitions in the Falicov-Kimball model

1999-08-06

arxiv.org/abs/cond-mat/9908094v1

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 4 figures

Scientific paper

The extrapolation of small-cluster exact-diagonalization calculations is used to examine the influence of correlated hopping on valence and metal-insulator transitions in the one-dimensional Falicov-Kimball model. It is shown that the ground-state phase diagram as well as the picture of valence and metal-insulator transitions found for the conventional Falicov-Kimball model (without correlated hopping) are strongly changed when the correlated hopping term is added. The effect of correlated hopping is so strong that it can induce the insulator-metal transition, even in the half-filled band case.

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