Competition between the Neel and the Effective Singlet States in Spin-1/2 Alternating : Heisenberg-Ising Antiferromagnet in One Dimension
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概要
- 論文の詳細を見る
The ground-state properties of the one-dimensional spin-1/2 alternatingFleisenberg-Ising antiferromagnet are studied both analytically and numerically. Thephase diagram is qualitatively predicted by the use of the phase Hamiltonian: Theground state is either the Neel or the effective singlet state according to the values ofthe alternation and anisotropy parameters. The phase transition between these statesis of the first order. The ground state energy, its derivative with respect to the alterna-lion parameter, excitation gap, and the various long-range order parameters are exactly calculated by the numerical method for finite systems (7V@2O). The numericalcalculations support the analytically predicted phase diagram. The correlation lengthis also numerically calculated at finite temperatures by the use of the quantumtransfer-matrix method.
- 社団法人日本物理学会の論文
- 1987-11-15
著者
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OKAMOTO Kiyomi
Department of Physics, Tokyo Institute of Technology
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NISHIMORI Hidetoshi
Department of Physics,Tokyo Institute of Technology
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Okamoto Kiyomi
Department Of Physics Faculty Of Science Tokyo Institute Of Technology
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YOKOZAWA Masayuki
Department of Physics,Faculty of Science,Tokyo Institute of Technology
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Yokozawa Masayuki
Department Of Physics Faculty Of Science Tokyo Institute Of Technology:national Institute Lf Agro-en
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Yokozawa Masayuki
Department Of Global Resources National Institute For Agro Environmental Sciences
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Nishimori Hidetoshi
Department Of Physics Tokyo Institute Of Technology
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Okamoto Kiyomi
Department Of Applied Physics Faculty Of Science Tokyo Institute Of Technology
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Nishimori Hidetoshi
Department Of Physics Faculty Of Science Tokyo Institute Of Technology
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Nishimori Hidetoshi
Department Of Physics Facuilty Of Science Tokyo Institute Of Technology
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