Magnetic-Field Induced Bose-Einstein Condensation of Magnons and Critical Behavior in Interacting Spin Dimer System TlCuCl_3(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
- 論文の詳細を見る
Magnetization measurements were performed to investigate the critical behavior of the field-induced magnetic ordering in gapped spin system TlCuCl_3. The critical density of the magnons was obtained as a function of temperature and the magnon-magnon interaction constant was evaluated. The experimental phase boundary for T<5K agrees almost perfectly with the magnon Bose-Einstein condensation (BEC) theory based on the Hartree-Fock approximation with realistic dispersion relations. The phase boundary can be described by the power law [H_N(T)-H_c] αT^φ. With decreasing fitting temperature range, the critical exponent φ decreases and converges at φ_BEC =3/2 predicted by the magnon BEC theory.
- 社団法人日本物理学会の論文
- 2008-01-15
著者
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SAKAKIBARA Toshiro
Institute for Solid State Physics, University of Tokyo
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TANAKA Hidekazu
Department of Natural History Sciences, Faculty of Science, Hokkaido University
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ONO Toshio
Department of Physics, Tokyo Institute of Technology
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Misguich Gregoire
Service De Physique Theorique Cea-saclay
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Misguich Gregoire
Service De Physique Theorique
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Ono Toshio
Department Of Physics Tokyo Institute Of Technology
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Ono Toshio
Department Of Oral Biochemistry Nagasaki University School Of Dentistry
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YAMADA Fumiko
Department of Physics, Tokyo Institute of Technology
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OSHIKAWA Masaki
Institute for Solid State Physics, The University of Tokyo
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Sakakibara Toshiro
Institute For Solid State Physics The University Of Tokyo
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Yamada Fumiko
Department Of Physics Tokyo Institute Of Technology
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Oshikawa Masaki
Institute For Solid State Physics The University Of Tokyo
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Tanaka Hidekazu
Department Of Internal Medicine Iii Osaka Medical College
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Tanaka Hidekazu
Department Of Chemistry And Chemical Biology Gunma University
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SAKAKIBARA Toshiro
Institute for Solid State Physics, The University of Tokyo
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MISGUICH Gregoire
Service de Physique Theorique, CEA-Saclay
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