Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-06-06
Phys. Rev. B 74, 085104 (2006)
Physics
Condensed Matter
Strongly Correlated Electrons
accepted for publication in PRB
Scientific paper
10.1103/PhysRevB.74.085104
Phase separation in the Hubbard model is investigated with the dynamical cluster approximation. We find that it is present in the paramagnetic solution for values of filling smaller than one and at finite temperature when a positive next-nearest neighbor hopping is considered. The phase separated region is characterized by a mixture of a strongly correlated metallic and Mott insulating phases. Our results indicate that phase separation is driven by the formation of doped regions with strong antiferromagnetic correlations and low kinetic energy
Jarrell Mark
Macridin Alexandru
Maier Th.
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