Point-Contact Conductance in Asymmetric Chalker-Coddington Network Model
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概要
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We study the transport properties of disordered two-dimensional electron systems with a perfectly conducting channel. We introduce an asymmetric Chalker–Coddington network model and numerically investigate the point-contact conductance. We find that the behavior of the conductance in this model is completely different from that in the symmetric model. Even in the limit of a large distance between the contacts, we find a broad distribution of conductance and a non-trivial power law dependence of the averaged conductance on the system width. Our results are applicable to systems such as zigzag graphene nano-ribbons where the numbers of left- and right-going channels are different.
- Physical Society of Japanの論文
- 2009-08-15
著者
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Slevin Keith
Department Of Physics Faculty Of Science Toho University
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Ohtsuki Tomi
Department Of Physics Faculty Of Science University Of Tokyo
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Kobayashi Koji
Department Of Biology Faculty Of Science Chiba University
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Ohtsuki Tomi
Department of Physics, Sophia University, Chiyoda, Tokyo 102-8554
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Kobayashi Koji
Department of Physics, Sophia University, Chiyoda, Tokyo 102-8554
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Slevin Keith
Department of Physics, Osaka University, Toyonaka, Osaka 560-0043
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