| Project/Area Number |
20540375
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Kyoto University |
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Principal Investigator |
TOTSUKA Keisuke Kyoto University, 基礎物理学研究所, 准教授 (80291079)
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| Research Collaborator |
TANAKA Akihiro 物質材料研究機構, 主幹研究員
LECHEMINANT Philippe Cergy-Pontoise University, 教授
CAPPONI Sylvain University of Toulouse, 教授
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| Project Period (FY) |
2008 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | フラストレーション / スピン液体 / スピンネマティック / 多体交換相互作用 / トポロジカル秩序 / 磁化プラトー / 直交ダイマー模型 / 競合量子相 / スピンネマティック状態 / ベリー位相 / 量子らせん磁性体 / らせん磁性体 |
|---|
| Research Abstract |
An approach based on (bosonic) effective Hamiltonians has been developed in order to understand in a unifying and systematic manner the novel competing phases (vector-chiral, spin-nematic, etc.) in frustrated systems (specifically, quantum magnets with multiple-spin exchange interactions in 1D and 2D). The problem of magnetization plateaus has been revisited from the point of view of topological effects. It has been pointed out that a novel spin-liquid type plateaus with topological order may be realized in high magnetic fields.
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