| 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 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Osaka University |
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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 |
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| 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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