Phase separation in the particle-hole asymmetric Hubbard model

Details Phase separation in the particle-hole asymmetric Hubbard model Phase separation in the particle-hole asymmetric Hubbard model

2006-10-30

arxiv.org/abs/cond-mat/0610803v1

Phys. Rev. B 75, 125103 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 8 figures

Scientific paper

10.1103/PhysRevB.75.125103

The paramagnetic phase diagram of the Hubbard model with nearest-neighbor (NN) and next-nearest-neighbor (NNN) hopping on the Bethe lattice is computed at half-filling and in the weakly doped regime using the self-energy functional approach for dynamical mean-field theory. NNN hopping breaks the particle-hole symmetry and leads to a strong asymmetry of the electron-doped and hole-doped regimes. Phase separation occurs at and near half-filling, and the critical temperature of the Mott transition is strongly suppressed.

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