Enhanced Conductance Fluctuation due to the Zero-Conductance Fano Resonances in the Quantum Point Contact on Graphene(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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The electronic transport properties in graphene quantum point contacts are numerically studied. The constriction of the quantum point contact induces the zero-conductance Fano resonances in the low-energy single channel transport region near the Dirac point, i.e., perfect reflection. Randomly distributed impurities which alter the resonance energies cause large conductance fluctuation comparable to the ensemble averaged dimensionless conductance. Our results identify a further intriguing effect of impurity scattering in the electronic transport properites of graphene.
- 2008-11-15
著者
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Sigrist Manfred
Theoretische Physik Eth-honggerberg
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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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Sigrist Manfred
Theoretische Physik
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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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