2019 Fiscal Year Final Research Report
Observation of quantum spin-nematic phase in a one-dimensional quantum antiferromagnet
| Project/Area Number |
17K14344
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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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) |
2017-04-01 – 2020-03-31
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| Keywords | 量子スピン / スピン液体 / 低次元磁性体 / フラストレーション / 低温合成 |
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| Outline of Final Research Achievements |
We study the spin dynamics in the one-dimensional quantum antiferromagnets, in order to observe a new type of spin liquid, so-called spin nematic state.
Several new low-dimensional quantum antiferromagnets were successfully synthesized: a model compound for investigation of DM-induced frustration effects in a 1D quantum spin system Na2CuSO4Cl2, edge-shared tetrahedral spin-cluster chain system K2Cu3O(SO4)3, and first compound of a square-kagome quantum antiferromagnet KCu6AlBiO4(SO4)5Cl.
Comprehensive experimental studies by magnetic susceptibility, magnetization, heat capacity, inelastic neutron scattering measurements and rigorous theoretical studies revealed the presence of an quantum spin state in these compound.
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| Free Research Field |
物性（実験）
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| Academic Significance and Societal Importance of the Research Achievements |
モデル物質の探索領域をある地域で産出された鉱物群に絞った結果、新規低次元磁性体を複数見出すことに成功した。その結果、低次元磁性体の効率的な探索の指針確立にまで至った。今後のこの系の研究の発展に大きく寄与しているといえる。
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