Phase separation in the Hubbard Model

Details Phase separation in the Hubbard Model Phase separation in the Hubbard Model

1996-02-09

arxiv.org/abs/cond-mat/9602054v1

Physics

Condensed Matter

8 pages, LATEX, to appear in Phys. Rev. Lett

Scientific paper

Making use of symmetry properties and known exact results for the Hubbard
Model on bipartite lattice, we show that (1) there is no phase separation for
repulsive coupling at low dopings, (2) phase separation and superconductivity
co-exist in the ground states for attractive coupling in a range of filling
fractions.

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