2015 Fiscal Year Final Research Report
High-field NMR study of novel quantum phases in quantum spin systems
| Project/Area Number |
26800176
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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 | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | 磁性 / 磁気共鳴 / フラストレーション系 / 量子スピン系 |
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| Outline of Final Research Achievements |
By using nuclear magnetic resonance (NMR) measurements in high-magnetic fields, we have investigated novel magnets which show unusual spin states due to quantum effects. In particular, we focus on spin nematic states which are analog of crystal liquids. In a candidate material volborthite, we have found an unusual magnetic phase near 25 T, where our NMR results support the realization of a spin nematic state. In another candidate NaCuMoO4(OH), we have investigated the magnetic structure at low temperatures by using NMR. We revealed the structure and field dependence up to 15 T. These results show that this compound is well described as ferromagnetic frustrated chains, which would show a spin nematic state in higher magnetic fields.
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| Free Research Field |
磁性物理学
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