Experimental study of topological phases in strongly correlated system
| Project/Area Number |
20F20315
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 外国 |
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| Review Section |
Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
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| Research Institution | The University of Tokyo |
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Principal Investigator |
中辻 知 東京大学, 大学院理学系研究科(理学部), 教授 (70362431)
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| Co-Investigator(Kenkyū-buntansha) |
FENG ZILI 東京大学, 理学(系)研究科(研究院), 外国人特別研究員
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| Project Period (FY) |
2020-11-13 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2022: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2021: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2020: ¥800,000 (Direct Cost: ¥800,000)
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| Keywords | Nodal Line / Anomalous Nernst Effect / Nodal line / Kagome Lattice / Magnetic Weyl Semimetal |
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| Outline of Research at the Start |
Our research is focused on the kagome antiferromagnet Mn3X (X=Sn, Ge) system. Mn3X hosts Weyl fermions coexisting with a cluster magnetic octuple order. We try to uncover the interplay between spin-structure and electronic-structure topology by investigating the magnetostriction behavior.
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| Outline of Annual Research Achievements |
We systematically studied the composition dependence of anomalous Nernst effect (ANE) in FexGa4-x system. Our research provides an ideal candidate for application using ANE. Firstly, We find a peak value of 5.4 μV/K in Fe3.09Ga0.91 which is the largest room-temperature value so far observed in polycrystalline magnetic compounds. Moreover, we found this large room-temperature ANE in the polycrystalline Fe3Ga is robust against Fe doping, making this material a promising candidate. Secondly, our work provides an experimental realization of the tuning of the anomalous Nernst effect by the Berry curvature engineering. Our theoretical analysis suggests that the Fe doping increases the exchange splitting effect, thereby tuning Berry curvature near the Fermi energy.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
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Report
(3 results)
Research Products
(3 results)
