2007 Fiscal Year Final Research Report Summary
Experimental Study of Many-Body Effects in Quantum Dots
| Project/Area Number |
17204023
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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 |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KATSUMOTO Shingo The University of Tokyo, Institute for Solid State Physics, Professor (10185829)
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| Co-Investigator(Kenkyū-buntansha) |
HASHIMOTO Yoshiaki The University of Tokyo, Institute for Solid State Physics, Technical Staff (20396922)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Quantum dot / Mesoscopic phenomena / Q?uantum computation / Tunneling phenomena / Few electron system |
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| Research Abstract |
Most important quantity obtained in coherent transport is the phase shift through the dots, which gives complementary information to the scattering amplitude (i.e., the conductance). However two-terminal devices have an essential difficulty called "phase rigidity" in obtaining the phase shift. There are two representative ways to avoid the problem : one is to adopt multi-terminal configuration and another is to use resonance in the interferometer. This article mainly reviews the latter approaches. Such resonance in the whole interferometer often joins with local resonance inside the interferometer and appears as the Fano effect, which is a powerful tool to investigate the phase shift problem with the aid of theories. In addition to such resonances of single-electron states, spin of electrons causes a kind of many-body resonance, that is, the Kondo effect. Combination of these resonances is the Fano-Kondo effect. Experiments on the Fano-Kondo effect, which unveil natures of the Kondo resonance, are also investigated.
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Research Products
(48 results)
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[Presentation] Spin Transport2005
Author(s)
S. Katsumoto
Organizer
Spintech 2005
Place of Presentation
Awaji, Japan
Year and Date
2005-08-01
Description
「研究成果報告書概要(和文)」より
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[Book] 超伝導と超流動2005
Author(s)
勝本信吾・河野公俊
Total Pages
141
Publisher
岩波書店
Description
「研究成果報告書概要(和文)」より
