2009 Fiscal Year Final Research Report
Kondo effect and spin manipulation in quantum dot complex systems
| Project/Area Number |
19540345
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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 | Keio University |
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Principal Investigator |
ETO Mikio Keio University, 理工学部, 教授 (00221812)
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| Project Period (FY) |
2007 – 2009
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| Keywords | メゾスコピック系・局在 / 量子ドット / 近藤効果 / スピン軌道相互作用 |
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| Research Abstract |
Quantum dots, boxes of nanometer scale fabricated on semiconductors, are often called artificial atoms. Artificial atoms with spin 1/2 show the Kondo effect as magnetic impurities in metals. In this project, the Kondo effect has been theoretically examined in a small ring with an embedded quantum dot, coupled quantum dots or artificial molecules, quantum dot in the presence of strong spin-orbit interaction, etc. In consequence, new physics has been revealed in this many-body problem. Spin manipulation in semiconductor nano-structures such as artificial atoms is an important issue for the application to quantum computers and spintronics. We have developed the fundamental researches for the spin injection and tunnel magnetoresistance.
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