Random-Matrix Approach to Quantum Electron Transport in Metallic Carbon Nanotubes
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概要
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The properties of quantum electron transport through metallic carbon nanotubes with several conducting channels are investigated by the random-matrix approach. Starting from the unique scattering symmetry observed in metallic carbon nanotubes with long-range impurity potential, we can derive the random-matrix representation in which the classical and quantum processes are clearly separated. With increasing system length, the system approaches a fixed point, where only one channel is perfectly conducting and other channels are completely closed. It is shown that such behavior should be attributed to the antilocalization effect. We can describe the decoherence effect on the total transmission probability (T) within the random-matrix theory. For a nanotube of length L, we obtain (T) ∼ L_φ/L for I ≲ L_φ ≪ L,where I and L_φare the mean free path and the phase coherence length, respectively.
- 社団法人日本物理学会の論文
- 2003-11-15
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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