Phase diagram of an extended Hubbard model with correlated hopping at half filling
- 15 May 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 51 (19) , 13774-13777
- https://doi.org/10.1103/physrevb.51.13774
Abstract
We study a generalized Hubbard model with on-site interaction U, nearest-neighbor repulsion V, and general correlated hopping under the condition that the number of doubly occupied sites is conserved. We find the exact ground state (GS) in arbitrary dimension in two wide regions of parameters. In one of them the GS is a Mott insulator (MI) and in the other it is a charge-density wave (CDW). The boundary of the MI and a large part of that of the CDW are determined exactly for relevant lattices. We study numerically the effect of relaxing the above-mentioned condition.Keywords
This publication has 25 references indexed in Scilit:
- Brinkman-Rice transition in layered perovskitesPhysical Review B, 1993
- Effective one-band hamiltonian for cuprate superconductor metal-insulator transitionPhysica C: Superconductivity and its Applications, 1993
- Copper-oxygen charge excitations and the effective-single-band theory of cuprate superconductorsPhysical Review B, 1992
- Hole superconductivity and the high-oxidesPhysical Review B, 1990
- Hole superconductivityPhysics Letters A, 1989
- Comment on the Missing Bond-Charge Repulsion in the Extended Hubbard ModelPhysical Review Letters, 1988
- Missing Bond-Charge RepulsionPhysical Review Letters, 1988
- Missing bond-charge repulsion in the extended Hubbard model: Effects in polyacetylenePhysical Review Letters, 1987
- Electron correlations in narrow energy bandsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1963
- Effect of Correlation on the Ferromagnetism of Transition MetalsPhysical Review Letters, 1963