Transmission through a Quantum Dot with Two Orbitals
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概要
- 論文の詳細を見る
Transmission coefficient through a quantum dot, which contains two orbitals, is calculated in the weak-tunneling regime, taking into account the Coulomb interaction within the dot. Transmitted waves through these orbitals acquire phase shifts which differ by $\pi$ from each other in the present model. The transmission coefficient as a function of gate voltage exhibits symmetric and asymmetric line shapes, depending on temperature $T$. A nearly symmetric line shape appears in the temperature region of $0.05 \lesssim k_{\text{B}} T/\delta \lesssim 0.25$, where $\delta$ is the single-particle energy level separation in the dot. This behavior is understood by a combined action of the above-mentioned phase difference and the Coulomb interaction. A possibility that this mechanism explains the recent experiment is suggested.
- 2001-03-30
著者
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Izumida Wataru
Tarucha Mesoscopic Correlation Project
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Akera Hiroshi
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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Akera Hiroshi
Department of Applied Physics, Hokkaido University, Sapporo 060-8628, Japan
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Izumida Wataru
Tarucha Mesoscopic Correlation Project, ERATO, JST, 4S-308S, NTT Atsugi Research and Development Center, 3-1 Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
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