| Project/Area Number |
20540323
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
GOTO Atushi (GOTO Atsushi) 独立行政法人物質・材料研究機構, 極限計測ユニット, 主幹研究員 (30354369)
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| Co-Investigator(Kenkyū-buntansha) |
HASHI Kenjiro 独立行政法人物質・材料研究機構, 極限計測ユニット・強磁場NMRグループ, 主任研究員 (00321795)
SHIMIZU Tadashi 独立行政法人物質・材料研究機構, 極限計測ユニット・強磁場NMRグループ, グループリーダー (00354366)
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| Project Period (FY) |
2008 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Keywords | 半導体物理 / 光物性 / 核磁気共鳴 / 光ポンピング / 動的核偏極 / スピンエレクトロニクス / 交差分極 / 半導体物性 |
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| Research Abstract |
We have investigated the characteristics of the optically hyperpolarized nuclear spin systems in compound semiconductors using the optical-pumping nuclear-magnetic-double-resonance system developed for this study. The results obtained have led us to the following conclusions :(1) Single resonance NMR experiments under the light illumination have revealed that there exist multiple processes for the optical nuclear hyperpolarizations, which can be distinguished by the comparison of the buildup times of the nuclear spin polarizations at different nuclear sites.(2) Double resonance NMR experiments under the light illumination have manifested a new phenomenon, i. e., optically induced nuclear spin-spin couplings in semiconductors.
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