2010 Fiscal Year Final Research Report
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)
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| Project Period (FY) |
2008 – 2010
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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 |
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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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