Phys. Rev. B 75, 125103 (2007) [7 pages]Phase separation in the particle-hole asymmetric Hubbard modelReceived 31 October 2006; published 2 March 2007 The paramagnetic phase diagram of the Hubbard model with nearest-neighbor 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.125103
DOI:
10.1103/PhysRevB.75.125103
PACS:
71.27.+a, 71.30.+h
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