Magnetic-Field Induced Bose–Einstein Condensation of Magnons and Critical Behavior in Interacting Spin Dimer System TlCuCl<SUB>3</SUB>
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- Yamada Fumiko
- Department of Physics, Tokyo Institute of Technology
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- Ono Toshio
- Department of Physics, Tokyo Institute of Technology
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- Tanaka Hidekazu
- Department of Physics, Tokyo Institute of Technology
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- Misguich Grégoire
- Service de Physique Théorique, CEA-Saclay
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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
Bibliographic Information
- Other Title
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- Magnetic-field induced Bose-Einstein condensation of magnons and critical behavior in interacting spin dimer system TlCuCl3
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Abstract
Magnetization measurements were performed to investigate the critical behavior of the field-induced magnetic ordering in gapped spin system TlCuCl3. 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<5 K 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 [HN(T)−Hc]∝Tφ. With decreasing fitting temperature range, the critical exponent φ decreases and converges at φBEC=3⁄2 predicted by the magnon BEC theory.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 77 (1), 013701-013701, 2008
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679173760128
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- NII Article ID
- 130005436132
- 110006594891
- 210000107046
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- NII Book ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 9330946
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed