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cond-mat1996★ 47 cited
Impurity Effect on Spin Ladder System
Yukitoshi Motome, Nobuyuki Katoh, Nobuo Furukawa +1
Effects of nonmagnetic impurity doping in a spin ladder system with a spin gap are investigated by the exact diagonalization as well as by the variational Monte Carlo calculations.…
cond-mat1995★ 68 cited
Spin Gap in Two-Dimensional Heisenberg Model for CaVO
Nobuyuki Katoh, Masatoshi Imada
We investigate the mechanism of spin gap formation in a two-dimensional model relevant to Mott insulators such as CaVO. From the perturbation expansion and quantum Monte Ca…