Perfectly conducting channel and its robustness in disordered carbon nanostructures

Perfectly conducting channel and its robustness in disordered carbon nanostructures

We report our recent numerical study on the effects of dephasing on a perfectly conducting channel (PCC), its presence believed to be dominant in the transport characteristics of a zigzag graphene nanoribbons (GNR) and of a metallic carbon nanotubes (CNT). Our data confirms an earlier prediction tha...

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Veröffentlicht in:arXiv.org 2012-06
Hauptverfasser: Ashitani, Yuki, Imura, Ken-Ichiro, Takane, Yositake
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Carbon nanotubes
Graphene
Nanotubes
Physics - Mesoscale and Nanoscale Physics
Resistance
Robustness (mathematics)
Transport properties
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Takane, Yositake
description We report our recent numerical study on the effects of dephasing on a perfectly conducting channel (PCC), its presence believed to be dominant in the transport characteristics of a zigzag graphene nanoribbons (GNR) and of a metallic carbon nanotubes (CNT). Our data confirms an earlier prediction that a PCC in GNR exhibits a peculiar robustness against dephasing, in contrast to that of the CNT. By studying the behavior of the conductance as a function of the system's length we show that dephasing destroys the PCC in CNT, whereas it stabilizes the PCC in GNR. Such opposing responses of the PCC against dephasing stem from a different nature of the PCC in these systems.
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subjects Carbon nanotubes
Graphene
Nanotubes
Physics - Mesoscale and Nanoscale Physics
Resistance
Robustness (mathematics)
Transport properties
title Perfectly conducting channel and its robustness in disordered carbon nanostructures
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