Spin dynamics in small conductors probed by current fluctuations
Project/Area Number |
25887037
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Research Category |
Grant-in-Aid for Research Activity Start-up
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Allocation Type | Single-year Grants |
Research Field |
Condensed matter physics I
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Research Institution | Osaka University |
Principal Investigator |
ARAKAWA TOMONORI 大阪大学, 理学(系)研究科(研究院), 助教 (00706757)
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Project Period (FY) |
2013-08-30 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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Keywords | メゾスコピック系 / スピントロニクス / ショット雑音 / スピン流 / スピン蓄積 / 微小接合 / スピン依存伝導 / 非平衡 |
Outline of Final Research Achievements |
How can we electrically detect spin current? In 1918, Schottky argued that the electric flow in a vacuum tube shows peculiar fluctuation whose amplitude is proportional to elementary charge and to the mean current. This is shot noise, a direct consequence of the discreteness of the electric charge. Now, consider the discreteness of spin. By using a spin-valve-type solid-state device, we successfully detected the shot noise induced by a non-equilibrium spin accumulation. The observed shot noise is proportional to the spin current, yielding a spin analogue of Schottky's argument. Our experimental demonstration could open a novel way to approach non-equilibrium spin phenomena like spintronics.
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Report
(3 results)
Research Products
(40 results)
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[Journal Article] Shot Noise Induced by Nonequilibrium Spin Accumulation2015
Author(s)
T. Arakawa, J. Shiogai, M. Ciorga, M. Utz, D. Schuh, M. Kohda,J. Nitta, D. Bougeard, D. Weiss, T. Ono, and K. Kobayashi
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Journal Title
Phys. Rev. Lett.
Volume: 114
Issue: 1
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] Shot noise induced by nonequilibrium spin accumulation2014
Author(s)
Tomonori Arakawa, Junichi Shiogai, Mariusz Ciorga, Martin Utz, Dieter Schuh, Makoto Kohda, Junsaku Nitta, Dominique Bougeard, Dieter Weiss, Teruo Ono, Kensuke Kobayashi
Organizer
The 1st International Symposium on Interactive Materials Science Cadet Program (iSIMSC)
Place of Presentation
Hotel Hankyu Expo Park(Osaka)
Year and Date
2014-11-17 – 2014-11-19
Related Report
Invited
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[Presentation] Observation of Spin Shot Noise2014
Author(s)
Tomonori Arakawa, Junichi Shiogai, Mariusz Ciorga, Martin Utz, Dieter Schuh, Makoto Kohda, Junsaku Nitta, Dominique Bougeard, Dieter Weiss, Teruo Ono, Kensuke Kobayashi
Organizer
The 32th International Conference on Physics of Semiconductors (ICPS 2014)
Place of Presentation
Austin(USA)
Year and Date
2014-08-10 – 2014-08-15
Related Report
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