Kondo effect and spin manipulation in quantum dot complex systems
Project/Area Number |
19540345
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Condensed matter physics I
|
Research Institution | Keio University |
Principal Investigator |
ETO Mikio Keio University, 理工学部, 教授 (00221812)
|
Project Period (FY) |
2007 – 2009
|
Project Status |
Completed (Fiscal Year 2009)
|
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)
|
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 / スポン軌道相互作用 / フピンホール効果 / アハロノフ・ボーム効果 / スピンバルブ / トンネル磁気抵抗 / スピンエレクトロニクス / メゾスコピック系 / 物性理論 / 量子情報処理 / 量子輸送現像 / 量子輸送現象 |
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.
|
Report
(4 results)
Research Products
(104 results)