2009 Fiscal Year Final Research Report
Novel Magnetic States by Ring Exchange
| Project/Area Number |
17071011
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
MOMOI Tsutomu The Institute of Physical and Chemical Research, 古崎物性理論研究室, 専任研究員 (80292499)
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| Co-Investigator(Kenkyū-buntansha) |
KUBO Kenn 青山学院大学, 理工学部, 教授 (30015862)
MIYASHITA Seiji 東京大学, 大学院・理学系研究科, 教授 (10143372)
TSUNETSUGU Hirokazu 東京大学, 物性研究所, 教授 (80197748)
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| Co-Investigator(Renkei-kenkyūsha) |
OHASHI Takuma 大阪大学, 大学院・理学研究科, 助教 (20452419)
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| Project Period (FY) |
2005 – 2009
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| Keywords | 磁性 / リング交換 / 固体ヘリウム3 / 磁気フラストレーション / スピンネマティ |
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| Research Abstract |
In the triangular lattice multi-spin exchange model in an experimentally estimated parameter regime, we found that, magnons form two-magnon bound states, giving rise to a spin nematic order, and a narrow half-magnetization plateau also appears under magnetic field. It was revealed that spin nematic orders realize, in general, in frustrated magnets in the proximity to the ferromagnetic phase boundary. In addition, we studied strongly correlated electron systems on geometrically frustrated lattices, showing a reentrant behavior of Mott transition and formation of one-dimensional spin correlations. Stability of supersolid in bosonic particle systems was also tested in numerical simulations.
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