Kenn Kubo

Magnetization plateau in a two-dimensional multiple-spin exchange model

We study a multiple-spin exchange model on a triangular lattice, which is a possible model for low-density solid

Ferromagnetism in the Hubbard model with orbital degeneracy in infinite dimensions

{}^{3}mathrm{He}

Elementary excitations in the Delta chain.

films. Due to strong competitions between ferromagnetic three-spin exchange and the antiferromagnetic four-spin one, the ground states are highly degenerate in the classical limit. At least

Ground state of a spin system with two- and four-spin exchange interactions on the triangular lattice

{2}^{L/2}

Magnetic Susceptibility of the Strongly Correlated Hubbard Model

-fold degeneracy exists on the

Possible Chiral Phase Transition in Two-Dimensional Solid {sup 3}He

Lifmmodetimeselsetexttimesfi{}L

Long-range order in the XXZ model

triangular lattice except for the SO(3) symmetry. In the magnetization process, we found a plateau at

Spin Correlations in the S=1 XXZ Chain

{m/m}_{mathrm{sat}}=frac{1}{2},

A Possible Magnetic Phase with Scalar Chirality in Solid 3He Layers

in which the ground state is uuud state (a collinear state with four sublattices). The

A Monte Carlo calculation of the structure factor of the 1D spin-12 Heisenberg antiferromagnet

frac{1}{2}