139 citations · 1.8k across the 90 of their papers we have counts for
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Spin-Chirality Separation and S_3-Symmetry Breakings in the Magnetization Plateau of the Quantum Spin Tube
Kouichi Okunishi, Masahiro Sato, Toru Sakai +2
We study the magnetization plateau state of the three-leg spin-1/2 tube in the strong rung coupling region, where S_3-symmetry breakings and low-energy chirality degree of freedom…
Numerical-Diagonalization Study of Spin Gap Issue of the Kagome Lattice Heisenberg Antiferromagnet
Hiroki Nakano, Toru Sakai
We study the system size dependence of the singlet-triplet excitation gap in the kagome-lattice Heisenberg antiferromagnet by numerical diagonalization. We successfully obt…
How to distinguish the Haldane/Large-D state and the intermediate-D state in an S=2 quantum spin chain with the XXZ and on-site anisotropies
Kiyomi Okamoto, Takashi Tonegawa, Hiroki Nakano +3
We numerically investigate the ground-state phase diagram of an S=2 quantum spin chain with the and on-site anisotropies described by ${\mathcal H}=\sum_j (S_j^x S_{j+1}^x+S_…
Critical magnetization behaviors of the triangular and Kagome lattice quantum antiferromagnets
Toru Sakai, Hiroki Nakano
We investigate the quantum spin antiferromagnets on the triangular and Kagome lattices in magnetic field, using the numerical exact diagonalization. Particularly we focus o…
Collapse of Ferrimagnetism in Two-Dimensional Heisenberg Antiferromagnet due to Frustration
Hiroki Nakano, Tokuro Shimokawa, Toru Sakai
We study ferrimagnetism in the ground state of the antiferromagnetic Heisenberg model on the spatially anisotropic kagome lattice, in which ferrimagnetism of the conventional Lieb-…