84 citations · 301 across the 18 of their papers we have counts for
18 papers
Mott Insulator-like Bose-Einstein Condensation in a Tight-Binding System of Interacting Bosons with a Flat Band
Hosho Katsura, Naoki Kawashima, Satoshi Morita +2
We propose a new class of tight-binding systems of interacting bosons with a flat band, which are exactly solvable in the sense that one can explicitly write down the unique ground…
An extension of the cell-construction method for the flat-band ferromagnetism
Akinori Tanaka
We present an extension of the cell-construction method for the flat-band ferromagnetism. In a rather general setting, we construct Hubbard models with highly degenerate single-ele…
Ferromagnetism in the Hubbard model with a gapless nearly-flat band
Akinori Tanaka
We present a version of the Hubbard model with a gapless nearly-flat lowest band which exhibits ferromagnetism in two or more dimensions. The model is defined on a lattice obtained…
Metallic ferromagnetism supported by a single band in a multi-band Hubbard model
Akinori Tanaka, Hal Tasaki
We construct a multi-band Hubbard model on the lattice obtained by "decorating" a closely packed -dimensional lattice (such as the triangular lattice) where $d\ge2…
One-dimensional extended Hubbard model with spin-triplet pairing ground states
Akinori Tanaka
We show that the one-dimensional extended Hubbard model has saturated ferromagnetic ground states with the spin-triplet electron pair condensation in a certain range of parameters.…
Nagaoka states in the SU() Hubbard model
Hosho Katsura, Akinori Tanaka
We present an extension of Nagaoka's theorem in the SU() generalization of the infinite- Hubbard model. It is shown that, when there is exactly one hole, the fully polarized…