62 citations · 62 across the 2 of their papers we have counts for
3 papers
cond-mat.str-el2003★ 62 cited
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…
cond-mat.str-el2003
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…
cond-mat1996
Determination of Exchange Parameters for CaV_4O_9
Ken'ichi Takano, K. Sano
Magnetic susceptibility measured for CaVO is analyzed by a method with high temperature expansion. The analysis is consistent with the -value which is close to 2 and is…