2023 Fiscal Year Annual Research Report
Exploring topological and quantum effects in ferromagnetic Weyl semimetals for spintronic devices
| Project/Area Number |
22KF0035
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| Allocation Type | Multi-year Fund |
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| Research Institution | Tohoku University |
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Principal Investigator |
HAN JIAHAO 東北大学, 材料科学高等研究所, 助教 (90990135)
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| Project Period (FY) |
2023-03-08 – 2024-03-31
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| Keywords | Magnetic Weyl semimetal / Chiral-spin structure / Handedness anomaly / Geometric structure |
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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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