| Project/Area Number |
22KF0035
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| Project/Area Number (Other) |
22F32037 (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 | 外国 |
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| Review Section |
Basic Section 29010:Applied physical properties-related
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| Research Institution | Tohoku University |
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Principal Investigator |
HAN JIAHAO (2023) 東北大学, 材料科学高等研究所, 助教 (90990135)
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| Host Researcher |
深見 俊輔 (2022) 東北大学, 電気通信研究所, 教授 (60704492)
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| Foreign Research Fellow |
HAN JIAHAO 東北大学, 電気通信研究所, 外国人特別研究員
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| Project Period (FY) |
2023-03-08 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2023: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2022: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Magnetic Weyl semimetal / Chiral-spin structure / Handedness anomaly / Geometric structure / スピントロニクス / ワイル半金属 / ノンコリニア反強磁性 |
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| Outline of Research at the Start |
トポロジカル物性を利用した高機能スピントロニクス素子の実現を目指し、ワイル半金属を用いたスピントロニクス素子を作製してその特性を評価する。従来のトポロジカルな性質を持たない強磁性体で構成されるスピントロニクス素子では実現できない機能性を、ワイル半金属の持つトポロジカル物性により実現するための基盤を構築し、かつその応用展開に向けた可能性と課題を明らかにする。
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| Outline of Annual Research Achievements |
Magnetic Weyl semimetals (MWSMs) possess rich interactions between magnetic and electronic structures with non-trivial topology. In a MWSM Mn3Sn with a chiral-spin structure, we demonstrated a characteristic chiral-spin dynamics driven by electric current - the magnetic order parameter, so-called octupole moment, rotates oppositely to the conventional dipole moments. We term this effect as "handedness anomaly", which provides guideline for the coherent control of chiral-spin structures. We also achieved magnetic manipulation of the geometric structure (in other words, "shape") of the electronic states in Mn3Sn-based heterostructures.It sets up a paradigm to design novel electronic devices based on the quantum-mechanical states in MWSMs.
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