Thermodynamic Properties of the One-Dimensional Spin-1/2 Heisenberg Antiferromagnet with Competing Interactions
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概要
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Thermodynamic properties are studied for the one-dimensional spin-l /2Heisenberg antiferromagnet with antiferromagnetic first- and second-neighbor ex-change interactions. The internal energy, the specific heat, and the two-spin correla-tion function are calculated by means of the cluster transfer matrix method based onthe Suzuki-Trotter equivalence theorem. Special attc+ntion is paid to the asymptoticbehavior of the two-spin correlation function in the long-distarace limit. It is foundthat for a certain range of values of the interaction constants and of the temperature,the two-spin correlation function decays with an incommensurate or a higher-ordercommensurate oscillation as a function of the distance between two spins. We alsofind that there exists a quantum analog of the disorder line, on which the two-spin correlation function changes its character.thermodynamic properties, one-dimensional system, spin-172 Heisenberg an-tiferromagnet, competing interactions, cluster transfer matrix method, internalenergy, specific heat, two-spin correlation function, disorder line.
- 社団法人日本物理学会の論文
- 1988-08-15
著者
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Harada Isao
Department Of Physics Faculty Of Science Kobe University
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Tonegawa Takashi
Department Of Earth And Environmental Sciences Graduate School Of Environmental Studies Nagoya Unive
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Kimura Tetsuji
Department Of Physics Faculty Of Science Kobe University:nec Corporation
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Harada Isao
Department Of Physics Faculty Of Science Kobe University:institute For Theoretical Physics Universit
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