Dynamical Structure Factors of S=1 Bond-Alternating Heisenberg Chains at Finite Temperatures(Low Dimensional Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
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概要
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Dynamical structure factors of the S=1 bond-alternating spin chains in the dimer state are calculated at finite temperature using the pair dynamical correlated-effective-field approximation. At T=0, the delta-function-type peak corresponding to the one-magnon mode appears. When temperature increases, such a sharp peak is broadened and the additional weak peak caused by the excitation from the triplet state to the quintet state emerges in the higher energy region. The results are discussed in comparison with those obtained by the exact diagonalization method.
- 理論物理学刊行会の論文
- 2005-10-31
著者
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Suga Sei‐ichiro
Department Of Applied Physics Osaka University
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Suga Sei-ichiro
Department Of Applied Physics Osaka University
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Suga Seiichiro
Department Of Applied Physics Osaka University
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SUZUKI Takahumi
Department of Applied Physics, Osaka University
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Suzuki Takahumi
Department Of Applied Physics Osaka University
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