119 citations · 224 across the 4 of their papers we have counts for
4 papers
Ferromagnetism in the one-dimensional Hubbard model with orbital degeneracy: From low to high electron density
Harumi Sakamoto, Tsutomu Momoi, Kenn Kubo
We studied ferromagnetism in the one-dimensional Hubbard model with doubly degenerate atomic orbitals by means of the density-matrix renormalization-group method and obtained the g…
Magnetism and Electronic States of Systems with Strong Hund Coupling
K. Kubo, D. M. Edwards, A. C. M. Green +2
This paper is a brief review of our recent studies concerning on magnetism and electronic states of lattice systems with Hund coupling. First we examined the effectiveness of the H…
Magnetization plateau in a two-dimensional multiple-spin exchange model
Tsutomu Momoi, Harumi Sakamoto, Kenn Kubo
We study a multiple-spin exchange model on a triangular lattice, which is a possible model for low-density solid 3He films. Due to strong competitions between ferromagnetic three-s…
Ground states with cluster structures in a frustrated Heisenberg chain
K. Takano, K. Kubo, H. Sakamoto
We examine the ground state of a Heisenberg model with arbitrary spin S on a one-dimensional lattice composed of diamond-shaped units. A unit includes two types of antiferromagneti…