| Project/Area Number |
22KJ1151
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| Project/Area Number (Other) |
22J23068 (2022)
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Multi-year Fund (2023)
Single-year Grants (2022) |
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| Section | 国内 |
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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 |
YU Tonghua 東京大学, 工学系研究科, 特別研究員(PD)
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| Project Period (FY) |
2023-03-08 – 2025-03-31
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| Project Status |
Completed (Fiscal Year 2024)
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| Budget Amount *help |
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2024: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2023: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2022: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Electrides / Half-Heuslers / Magnetoresistance / First-principles / Topological phases / Majorana Fermions / Weyl semimetals / Topological materials / Magnetism / Molecular crystals / Ab initio calculations |
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| Outline of Research at the Start |
This research aims to deepen our fundamental understanding of unique properties of electrides, a distinct family of materials where some electrons reside at interstitial space, and meanwhile implement electrides as a testbed for novel theories and methods, through which we hope to advance our predictive capability of this kind of notable materials.
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| Outline of Annual Research Achievements |
1. In collaboration with experimentalists, we expanded the study of the half-Heusler compound HoAuSn to more materials in this family, RAuSn (R = Ho, Er, Tm, Lu). For all systems with magnetic rare-earth ions, colossal negative magnetoresistance were discovered, which are attributed to the field induced Weyl- semimetal phase therein. A rich variety of spin textures was revealed in LuAuSn.
2. In electrides, the superconductivity is believed to be of BCS origin, and has limited association with the interstitial electrons. We therefore tuned the research direction to focus more on the quantum geometry, to which the substantial overlap between interstitial orbitals with atomic orbitals could make significant contribution, as the preliminary result. Future investigation will be followed.
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