74 citations · 364 across the 11 of their papers we have counts for
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Phase diagram of the chain at half filling
M. E. Torio, A. A. Aligia, H. A. Ceccatto
We study the half filled Hubbard chain including next-nearest-neighbor hopping . The model has three phases: one insulating phase with dominant spin-density-wave correlations a…
Phase diagram of the Hubbard chain with two atoms per cell
M. E. Torio, A. A. Aligia, H. A. Ceccatto
We obtain the quantum phase diagram of the Hubbard chain with alternating on-site energy at half filling. The model is relevant for the ferroelectric perovskites and organic mixed-…
Phase diagram of the extended Hubbard chain with charge-dipole interactions
M. E. Torio, A. A. Aligia, K. Hallberg +1
We consider a modified extended Hubbard model (EHM) which, in addition to the on-site repulsion U and nearest-neighbor repulsion V, includes polarization effects in second-order pe…
Stability of homogeneous magnetic phases in a generalized t-J model
L. O. Manuel, H. A. Ceccatto
We study the stability of homogeneous magnetic phases in a generalized t-J model including a same-sublattice hopping t' and nearest-neighbor repulsion V by means of the slave fermi…
Superconductivity and incommensurate spin fluctuations in a generalized t-J model for the cuprates
C. D. Batista, L. O. Manuel, H. A. Ceccatto +1
We consider the slave-fermion Schwinger-boson decomposition of an effective model obtained through a systematic low-energy reduction of the three-band Hubbard Hamiltonian. The mode…