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Transport properties in network models with perfectly conducting channels

By K Kobayashi, K Hirose, H Obuse, T Ohtsuki and K Slevin


Abstract. We study the transport properties of disordered electron systems that contain perfectly conducting channels. Two quantum network models that belong to different universality classes, unitary and symplectic, are simulated numerically. The perfectly conducting channel in the unitary class can be realized in zigzag graphene nano-ribbons and that in the symplectic class is known to appear in metallic carbon nanotubes. The existence of a perfectly conducting channel leads to novel conductance distribution functions and a shortening of the conductance decay length. 1

Year: 2013
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