Effective theory of magnetic monopole in spin transport
| Project/Area Number |
25400344
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
Tatara Gen 国立研究開発法人理化学研究所, 創発物性科学研究センター, チームリーダー (10271529)
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| Research Collaborator |
SHIBATA Junya 東洋大学, 理工学部, 准教授 (20391972)
TAKEUCHI Akihito 青山学院大学, 理工学部, 助教 (80738328)
KONO Hiroshi 名古屋大学, 理学部, 教授 (10234709)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | スピン電荷変換 / スピン流 / 電磁交差相関 / メタマテリアル / スピン軌道相互作用 / スピン起電力 / スピンＢｅｒｒｙ位相 / モノポール / スピンBerry位相 |
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| Outline of Final Research Achievements |
Conversion of spin to other degrees of freedom is essential in spintronics. We have studied the conversion mechanisms of spin to electric current and light by a microscopic theory and obtained the following results. We have shown that the spin-charge conversion induced by spin-orbit interaction is described in terms of an effective electromagnetic field acting on electron spin. This effective field is an extension of spin Berry's phase to include spin-orbit interaction. We further demonstrated that the effective electromagnetic field results in a directional dichroism for light by causing the Doppler shift with respect to the intrinsic flow of electron spin. We have also presented a thermal vector potential formulation for describing thermal transport phenomena.
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Report
(4 results)
Research Products
(43 results)
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[Journal Article] Two-barrier stability that allows low power operation in current-induced domain wall motion2013
Author(s)
Kab-Jin Kim, Ryo Hiramatsu, Tomohiro Koyama, Kohei Ueda, Yoko Yoshimura, Daichi Chiba, Kensuke Kobayashi, Yoshinobu Nakatani, Shunsuke Fukami, Michihiko Yamanouchi, Hideo Ohno, Hiroshi Kohno, Gen Tatara, Teruo Ono
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Journal Title
Nature Communications
Volume: 4
Issue: 1
Pages: 2011-2011
DOI
Related Report
Peer Reviewed
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