| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2007: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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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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