Theory of Spin and Charge Distributions Controlled by Quantum Dot Systems with Geometric Structure
| Project/Area Number |
25400322
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Shizuoka University |
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Principal Investigator |
KOGA Mikito 静岡大学, 教育学部, 教授 (40324321)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUMOTO Masashige 静岡大学, 理学部, 教授 (20281058)
KUSUNOSE Hiroaki 明治大学, 理工学部, 准教授 (00292201)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 量子ドット / 近藤効果 / スピン電荷制御 / 誘起電気分極 / マルチフェロイックス / アハラノフ・ボーム効果 / マルチフェロイクス / 量子臨界点 |
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| Outline of Final Research Achievements |
We studied the controllability of spin and charge distributions through a quantum effect called "Kondo effect", using a triangular triple-quantum-dot system in which each quantum dot is regarded as an artificial atom. In the field of nanotechnology, we introduce a new aspect of multiferroics, for instance, a magnetic-field control of electric polarization.
The main results are as follows: (1) a sign reversal of emergent electric polarization through a competition between two quantum states; (2) field control of oscillation patterns of emergent electric polarization; (3)a sign reversal of emergent electric polarization through the Kondo effect due to molecular orbitals of the triangular loop.
The above results would contribute to opening up a new area of the Kondo physics.
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Report
(4 results)
Research Products
(14 results)
