Kondo Effect in Tunneling through a Quantum Dot : Condensed Matter: Electronic Properties, etc.
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概要
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Systematic calculation of tunneling conductance through a quantum dot, which has a single localized orbital, is carried out by using the numerical renormalization group method. In strongly correlated case, two paired Coulomb oscillation peaks grow without large increase of their width as the temperature decreases. At the same time the peak positions shift to their central side. This behavior corresponds well with the recent experimental data, and then suggests that the Kondo effect takes place at low temperatures in the experiment. Theoretically the conductance in valley region between the two peaks gradually increases, and the peaks merge into a broad single peak as the temperature further decreases. This behavior has not been observed in the experiment. The estimated Kondo temperature for the valley region is still much less than the lowest temperature in the experiment.
- 社団法人日本物理学会の論文
- 2001-04-15
著者
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SAKAI Osamu
Department of Physics, Tokyo Metropolitan University
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Sakai Osamu
Department Of Electronic Science And Engineering Kyoto University
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Izumida Wataru
Tarucha Mesoscopic Correlation Project Erato Jst 4s-308s Ntt Atsugi Research And Development Center
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Izumida Wataru
Tarucha Mesoscopic Correlation Project
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SUZUKI Syunya
Department of Physics, Tohoku University
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Suzuki Syunya
Department Of Physics Tohoku University
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Sakai Osamu
Department Of Cardiovascular Surgery Kyoto Prefectural University Of Medicine
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