Impurity-Bond Effect on the Spin-1 Antiferromagnetic Heisenberg Chain
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概要
- 論文の詳細を見る
Low-lying excited states of the spin-1 antiferromagnetic Heisenberg chain with an impurity bond are investigated in terms of domain-wall excitations by means of analytical methods as well as a method of numerical diagonalization. It is shown that 1) the impurity bond brings about a massive triplet mode in the Haldane gap, 2) the triplet state comprises three of the four ground states of an open chain, 3) the excited states with the domain wall trapped at the impurity bond, including the massive triplet mode, exhibit a Neel-type configuration of the magnetic moment around the impurity bond. On the basis of the present results, we propose a new energy versus magnetic-field diagram.
- 社団法人日本物理学会の論文
- 1993-06-15
著者
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鏑木 誠
神戸大学国際文化学部
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康 敏
神戸大学国際文化学研究科
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Harada I
Okayama Univ. Okayama
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Harada Isao
Institute For Solid State Physics University Of Tokyo
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Harada Isao
Department Of Physics Faculty Of Science Kobe University
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Tonegawa T
Department Of Mechanical Engineering Fukui University Of Technology
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Tonegawa Takashi
Department Of Earth And Environmental Sciences Graduate School Of Environmental Studies Nagoya Unive
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Tonegawa Takashi
Department Of Mechanical Engineering Fukui Uneversity Of Technology
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Kaburagi Makoto
Graduate School Of Intercultural Studies Kobe University
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Tonegawa Takashi
Faculty Of Engineering Fukui University Of Technology
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KABURAGI Makoto
Department of Informatics, Faculty of Cross-Cultural Studies, Kobe University
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鏑木 誠
神戸大学国際文化学研究科
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KABURAGI Makoto
Department of Physics, Osaka University
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HARADA Isao
Department of Physics, Kobe University : Department of Physics, Okayama University
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