Averaged Conductance of the Three-Edge Chalker-Coddington Model(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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To study electron transport in disordered wires with the channel-number imbalance between two propagating directions, we consider the three-edge Chalker-Coddington model consisting of one right moving and two left-moving edge channels of length L coupled by random tunneling. Since the imbalance makes one left-moving channel being perfectly conducting, the dimensionless conductances g and g' for the left-moving and right-moving channels, respectively, differ from each other and satisfy g=g'+1. Using a supersymmetry approach, we obtain the asymptotic form of the ensemble average <g>-1=<g'> which decays exponentially with increasing L. It is shown that the corresponding decay length is four times shorter than that for the two-edge case. This result is in quantitative agreement with the existing random-matrix theory.
- 社団法人日本物理学会の論文
- 2007-08-15
著者
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TAKANE Yositake
Department of Quantum Matter, Graduate School of Advanced Sciences of Matter, Hiroshima University
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WAKABAYASHI Katsunori
Department of Quantum Matter, Graduate School of Advanced Sciences of Matter, Hiroshima University
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Takane Yositake
Department Of Physical Electronics Hiroshima University
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Wakabayashi Katsunori
Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University:pre
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Wakabayashi Katsunori
Department Of Physical Electronics Hiroshima University
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Wakabayashi K
Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University
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Wakabayashi Katsunori
Hiroshima Univ. Hiroshima
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Wakabayashi Katsunori
Department Of Quantum Matter Graduate School Of Advanced Sciences Of Matter Hiroshima University:pre
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Wakabayashi Katsunori
Department Of Quantum Matter Science Graduate School Of Advanced Sciences Of Matter (adsm) Hiroshima
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Wakabayashi Katsunori
Department Of Quantum Matter Science Graduate School Of Advanced Sciences Of Matter (adsm) Hiroshima
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Takane Yositake
Department Of Applied Physics Osaka City University
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