Ground-State Phase Diagrams of the Two-Dimensional Quantum Heisenberg Spin Glass Models
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概要
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Ground-state properties of the two-dimensional S=1/2 random Heisenberg models are investigated by the exact-diagonalization method. The phase diagram of the bond-random model (the ±J model) is the same as that of the corresponding Ising spin glass model, in spite of quantum fluctuation. In the site-random model, the spin glass phase exists at least in the ferro-rich case. In comparison with the corresponding Ising model, the Neel phase of this model becomes much narrower in the ferro-rich case, while it is comparable in the antiferro-rich case.
- 社団法人日本物理学会の論文
- 1995-08-15
著者
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Nonomura Yoshihiko
Department Of Physics Tokyo Institute Of Technology
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Nonomura Yoshihiko
Department Of Physics Faculty Of Science University Of Tokyo
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Ozeki Yukiyasu
Department Of Physics Tokyo Institute Of Technology
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Ozeki Yukiyasu
Department Of Applied Physics And Chemistry The University Of Electro-communications
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