The Phase Diagram of Correlated Electrons in a Lattice of Berry Molecules

Details The Phase Diagram of Correlated Electrons in a Lattice of Berry Molecules The Phase Diagram of Correlated Electrons in a Lattice of Berry Molecules

1994-10-17

arxiv.org/abs/cond-mat/9410051v2

Phys. Rev. Lett. 74, 4039 (1995)

Physics

Condensed Matter

7 pages + 2 ps figures, published version

Scientific paper

10.1103/PhysRevLett.74.4039

A model for correlated electrons in a lattice with local additional spin--1 degrees of freedom inducing constrained hopping, is studied both in the low density limit and at quarter filling. We show that in both 1D and 2D two particles form a bound state even in presence of a repulsive U

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