21 citations · 74 across the 24 of their papers we have counts for
24 papers
Resonating-valence-bond liquid in low dimensions
Fusayoshi J. Ohkawa
The Hubbard model in dimensions, with the on-site repulsion and the transfer integral between nearest neighbors , is studied on the basis of the Kondo-lattice…
Adiabatic Continuation between Resonating-Valence-Bond Electron and Spin Liquids
Fusayoshi J. Ohkawa
The Hubbard model in the strong-coupling regime is studied by the Kondo-lattice theory. If no symmetry is broken at a sufficiently low temperature in sufficiently low dimensions, a…
Residual Entropy of the Mott Insulator with No Symmetry Broken
Fusayoshi J. Ohkawa
The half-filled ground state of the Hubbard model on the hypercubic lattice in D dimensions is studied by the Kondo-lattice theory, which is none other than the 1/D expansion theor…
Instability of the Mott or Lieb-Wu insulator caused by an infinitesimal perturbation
Fusayoshi J. Ohkawa
The half-filled ground state of the Hubbard model in one dimension is studied by Kondo-lattice theory. Because of the Kondo effect, any insulating ground state with a complete gap…
Itinerant-Electron Magnetism in the Heisenberg Limit
Fusayoshi J. Ohkawa
The Hubbard model in the Heisenberg limit is studied by Kondo-lattice theory. The Kondo temperature T_K or k_BT_K, which is an energy scale of low-energy local quantum spin fluctua…
Strong-coupling Superconductivity in the Cuprate Oxide
Fusayoshi J. Ohkawa
Superconductivity in the cuprate oxide is studied by Kondo-lattice theory based on the t-J model with the el-ph interaction arising from the modulation of the superexchange interac…