Theoretical study on spin-1/2 antiferromagnetic kagome systems with a spin gap
| Project/Area Number |
23540395
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 磁性 / フラストレーション / ハイゼンベルグ反強磁性体 / ジャロシンスキー-守谷相互作用 / カゴメ格子 / スピンボール / スピンギャップ / 帯磁率 / フェリ磁性 |
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| Research Abstract |
A deformed kagome system Rb2Cu3SnF12 and spin balls Mo72V30 and W72V30, which are icosidodecahedrons with quantum spins on their vertices, are studied theoretically. For Rb2Cu3SnF12, origin of each of branches in the low-energy spectrum obtained by high-resolution inelastic neutron scattering experiments is specified, and effects of Dzyaloshinskii-Moriya interactions are clarified. For Mo72V30, it is discussed that the small spin gap can be ascribed to the deformation with the D5h symmetry. For W72V30, it is possible to observe low-energy singlet states within the spin gap by Raman scattering experiments.
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Report
(4 results)
Research Products
(23 results)
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[Presentation] Excitations under fields of the pinwheel valence bond solid state in the Kagome antiferromagnet Rb2Cu3SnF122013
Author(s)
Y. Nambu, K. Matan, Y. Zhao, T. Ono, Y. Fukumoto, A. Podlesnyak, G. Ehlers, J.W. Lynn, T. J. Sato, C. Broholm, an H. Tanaka
Organizer
International Conference on Neutron Scattering 2013
Place of Presentation
Edinburgh International Conference Centre in Edinburgh
Year and Date
2013-07-11
Related Report
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[Presentation] 籠目格子反強磁性体Rb2Cu3SnF12における一重項・三重項励起の磁場依存性2013
Author(s)
南部雄亮, K. Matan, Y. Zhao, 小野俊雄, 福元好志, A. Podlesnyak, G. Ehlers, J.W. Lynn, 佐藤卓, C. Broholm, 田中秀数
Organizer
日本物理学会第68回年次大会
Place of Presentation
広島大学東広島キャンパス
Year and Date
2013-03-26
Related Report
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[Presentation] Excitations under fields of the pinwheel valence bond solid state in the Kagome antiferromagnet Rb2Cu3SnF12
Author(s)
Y. Nambu, K. Matan, Y. Zhao, T. Ono, Y. Fukumoto, A. Podlesnyak, G. Ehlers, J.W. Lynn, T.J. Sato, C. Broholm, an H. Tanaka
Organizer
International Conference on Neutron Scattering 2013
Place of Presentation
Edinburgh, Scotland
Related Report
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[Presentation] 籠目格子反強磁性体Rb2Cu3SnF12における一重項･三重項励起の磁場依存性
Author(s)
南部雄亮, K. Matan, Y. Zhao, 小野俊雄, 福元好志, A. Podlesnyak, G. Ehlers, J.W. Lynn, 佐藤卓, C. Broholm, 田中秀数
Organizer
日本物理学会第68回年次大会
Place of Presentation
広島大学東広島キャンパス
Related Report
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