110 citations · 859 across the 63 of their papers we have counts for
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cond-mat.stat-mech2002★ 59 cited
Quantum magnetization plateaux of an anisotropic ferrimagnetic spin chain
Toru Sakai, Kiyomi Okamoto
The magnetization curve of the ferrimagnetic alternating spin chain with the single-ion anisotropy is investigated with the numerical exact diagonalization of f…
cond-mat.stat-mech2002★ 16 cited
Level Spectroscopy: Physical Meaning and Application to the Magnetization Plateau Problems
Kiyomi Okamoto
We review the level spectroscopy, which is a powerful method of analyzing the numerical data with respect to the Berezinskii-Kosterlitz-Thouless quantum phase transition in one dim…
cond-mat.stat-mech2002★ 12 cited
Anisotropies of the Hamiltonian and the Wave Function: Inversion Phenomena in Quantum Spin Chains
Kiyomi Okamoto
We investigate the inversion phenomenon between the XXZ anisotropies of the Hamiltonian and the wave function in quantum spin chains, mainly focusing on the S=1/2 trimerized XXZ mo…