Phase separation in the particle-hole asymmetric Hubbard model

Abstract

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.

8 pages, 8 figures

References in corpus (7)

• Variational cluster approach to correlated electron systems in low dimensions
• Self-energy-functional approach: Analytical results and the Mott-Hubbard transition
• Mott transition in Kagomé lattice Hubbard model
• Phase separation in the Hubbard model
• Hopping on the Bethe lattice: Exact results for densities of states and dynamical mean-field theory
• Dynamical mean field study of the Mott transition in the half-filled Hubbard model on a triangular lattice
• Green functions for nearest- and next-nearest-neighbor hopping on the Bethe lattice

Cited by in corpus (5)

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• Non-perturbative conserving approximations and Luttinger's sum rule
• Anderson localization on Falicov-Kimball model with next-nearest-neighbor hopping and long-range correlated disorder