Interference Effect in Multilevel Transport through a Quantum Dot(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We present experimental results and a model to solve the problem of "in-phase Coulomb peaks" observed in transport through a quantum dot. In the marginal region between the Coulomb-blockade and open-dot, we have observed Fano-type interference through two energy levels inside the dot, which manifest themselves in two overlapped Coulomb-diamond-like structures in the excitation spectrum. One of the two levels is strongly coupled to the leads and the phase of traversing electrons is locked to it. We have detected the phase change at the vertices and the centers of the larger diamonds through the sign of Fano's asymmetric parameters supporting the above deduction.
- 一般社団法人日本物理学会の論文
- 2004-12-15
著者
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Iye Yasuhiro
Institute For Solid State Physics The University Of Tokyo
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SANO Akira
Institute for Solid State Physics, University of Tokyo
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Katsumoto Shingo
Institute For Solid State Physics University Of Tokyo
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Aikawa Hisashi
Institute For Solid State Physics University Of Tokyo
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Kobayashi Kensuke
Institute For Chemical Research Kyoto University
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