Phase Diagram and Superconducting Properties of an Exactly Solvable Model with Correlated Hopping

Abstract

The model of strongly correlated electrons with the correlated hopping term and an additional interaction between holes $V$ is solved exactly in one dimension at a special point where the number of hole pairs is conserved. As a function of the interaction $V$ the phase diagram has a rich structure. There exist gapless phases with dominating density-density correlations (metallic) or pair-pair correlations (superconducting) as well insulating and phase-separated phases. The stiffness constant of the conductivity, the effective transport mass, and the compressibility are also exactly calculated in several regions of the phase diagram.

11 pages, latex

References in corpus (7)

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Cited by in corpus (6)

• Why holes are not like electrons: A microscopic analysis of the differences between holes and electrons in condensed matter
• Exact Solution of the Asymmetric Exclusion Model with Particles of Arbitrary Size
• Quantum Monte Carlo and exact diagonalization study of a dynamic Hubbard model
• Exactly solvable interacting vertex models
• Asymmetric exclusion model with impurities
• Exact Solution of a Vertex Model with Unlimited Number of States Per Bond