Phase Separation in the Two-Dimensional Hubbard Model
arXiv:cond-mat/9609152 · doi:10.1103/PhysRevB.54.R8281
Abstract
By making use of known exact results and symmetry properties for the one-band Hubbard model, we show in a somewhat exact manner that there is no phase separation on a square lattice at arbitrary fillings at finite temperature for both attractive and repulsive on-site Coulomb interaction. This result is consistent with the quantum Monto Carlo calculation.
4 pages, Revtex, no figure, Phys. Rev. B (Rapid Commun.)