Spin blockade from spin channel to quantum dots and its application to qubit
| Project/Area Number |
20241033
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Microdevices/Nanodevices
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| Research Institution | Hokkaido University |
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Principal Investigator |
YOH Kanji 北海道大学, 量子集積エレクトロニクス研究センター, 教授 (60220539)
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| Co-Investigator(Kenkyū-buntansha) |
SUEOKA Kazuhisa 北海道大学, 情報科学研究科, 教授 (60250479)
NAKAZATO Hiromichi 早稲田大学, 理工学術院, 教授 (00180266)
大野 宗一 北海道大学, 大学院・工学研究科, 准教授 (30431331)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥48,620,000 (Direct Cost: ¥37,400,000、Indirect Cost: ¥11,220,000)
Fiscal Year 2010: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2009: ¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Fiscal Year 2008: ¥22,750,000 (Direct Cost: ¥17,500,000、Indirect Cost: ¥5,250,000)
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| Keywords | スピントランジスタ / スピン注入 / スピントロニクス / 量子計算 / 量子ドット / 量子もつれ / スピン / インジウム砒素 / スピン軌道相互作用 / スピンブロッケード / 量子計算機 / 量子ビット / InAs |
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| Research Abstract |
We have investigated surface reaction of Fe electrode and InAs substrate by thermodynamic calculation. We have fabricated a spin transistors with Fe electrode and verified current oscillation which agreed well with theoretical calculation. We have also fabricated an InAs nanowire spin transistor based on Au colloid and observed current oscillation which is presumably originates from spin-orbit interaction. In a spintransistor/quantum dot hybrid structure, we have theoretically demonstrated that spin polarization of 40% would be hard to verify quantum entanglement, but it would be appreciably large signal with 60% spin polarization and clear entanglement would be observable with 80% spin polarization in the spin channel.
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Report
(4 results)
Research Products
(89 results)
