Field-Induced Gaps in the Frustrated Spin Ladder : Condensed Matter: Electronic Properties, etc.
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概要
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We study the magnetization process of the S = 1/2 antiferromagnetic spin ladder in the presence of the second and the third-neighbor couplings which lead to frustration with the typical nearest-neighbor coupling. We use degenerate perturbation theory and level spectroscopy analysis of the numerical diagonalization data of the Hamiltonian for finite systems. We find two kinds of plateaux at half the saturation moment in the magnetization curve. One is mainly due to the second-neighbor couplings and the other to the third-neighbor couplings. The mechanisms of these two plateaux are quite different with each other.
- 社団法人日本物理学会の論文
- 2000-08-15
著者
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OKAMOTO Kiyomi
Department of Physics, Tokyo Institute of Technology
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坂井 徹
Japan Atomic Energy Agency Spring-8
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OKAZAKI Nobuhisa
Faculty of Science, Himeji Institute of Technology
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SAKAI Toru
Faculty of Science, Himeji Institute of Technology
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Okamoto K
Department Of Physics Tokyo Institute Of Technology
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Okamoto Kiyomi
Department Of Microbiology Kyoto Pharmaceutical University
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OKAMOTO Kunito
College of Arts and Sciences, Chiba University
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Okamoto Kiyomi
Department Of Applied Physics Faculty Of Science Tokyo Institute Of Technology
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Sakai Toru
Faculty Of Science Himeji Institute Of Technology
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OKAMOTO Kiyomi
Department of Applied Physics, Faculty of Science Tokyo Institute of Technology
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OKAMOTO Kiyomi
Department of Physics, Tokyo Institute of Tehchnology
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