62 citations · 62 across the 2 of their papers we have counts for
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Phase diagram of the one-dimensional Hubbard model with next-nearest-neighbor hopping
S. Nishimoto, K. Sano, Y. Ohta
We study the one-dimensional Hubbard model with nearest-neighbor and next-nearest-neighbor hopping integrals by using the density-matrix renormalization group (DMRG) method and Har…
Combined Analysis of Numerical Diagonalization and Renormalization Group methods for the One-Dimensional - Model at Quarter filling
Kazuhiro Sano, Yoshiaki Ono
The one-dimensional extended Hubbard model with both the on-site and the nearest neighbor interactions at quarter filling is studied by using a novel finite size scaling. W…
Nonlinear Sigma model method for the J1-J2 Heisenberg model: disordered ground state with plaquette symmetry
Ken'ichi Takano, Yoshiya Kito, Yoshiaki Ono +1
A novel nonlinear sigma model method is proposed for the two-dimensional J1-J2 model, which is extended to include plaquette-type distortion. The nonlinear sigma model is properly…
Magnetism and Superconductivity in a Two-band Hubbard Model in Infinite Dimensions
Y. Ono, K. Sano
We study a two-band Hubbard model using the dynamical mean-field theory combined with the exact diagonalization method. At the electron density , a transition from a band-insu…
Ferromagnetism and Superconductivity in the multi-orbital Hubbard Model: Hund's Rule Coupling versus Crystal-Field Splitting
Kazuhiro Sano, Yoshiaki Ono
The multi-orbital Hubbard model in one dimension is studied using the numerical diagonalization method. Due to the effect of the crystal-field splitting , the fully polarized fe…