Anomalous magnon transport phenomena induced by the Berry phase and exploration of related material functionality
| Project/Area Number |
23684023
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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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 |
ONOSE Yoshinori 東京大学, 大学院・総合文化研究科, 准教授 (80436526)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥29,510,000 (Direct Cost: ¥22,700,000、Indirect Cost: ¥6,810,000)
Fiscal Year 2012: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2011: ¥22,230,000 (Direct Cost: ¥17,100,000、Indirect Cost: ¥5,130,000)
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| Keywords | 強相関系 / スピントロニクス / マグノン / ベリー位相 / ホール効果 / マイクロ波 |
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| Research Abstract |
Magnon Hall effect, which was discovered by Onose et al., have been investigated for various ferromagnetic insulators. We have observed the distinctive effect of lattice geometry on magnon Hall effect and show that it can be explained in terms of the Berry phase of magnons induced by Dzyaloshinskii-Moriya interaction. In addition, we have setup the microwave measurement system, in which we can measure the resonant excitation of magnons by microwave under the magnetic field at low temperature. With use of it, we have observed unique magnon modes (skyrmion rotation mode, skyrmion breathing mode) in a topological magnetic state of skyrmion lattice.
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Report
(3 results)
Research Products
(18 results)
