Wave-Packet Dynamics Simulation on Electronic Transport in Carbon Nanotubes with Randomly Distributed Impurities

We investigate coherent electronic transport in semiconducting single-walled carbon nanotubes with randomly distributed impurities utilizing the wave-packet dynamics method combined with the mode-space decomposition method, focusing particularly on the case of small hole doping. From the behavior of...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2013-06, Vol.52 (6), p.06GD07-06GD07-4
Main Authors: Takada, Yukihiro, Yamamoto, Takahiro
Format: Article
Language:English
Subjects:
Doping
Dynamical systems
Dynamics
Electronics
Impurities
Localization
Position (location)
Transport
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Summary:We investigate coherent electronic transport in semiconducting single-walled carbon nanotubes with randomly distributed impurities utilizing the wave-packet dynamics method combined with the mode-space decomposition method, focusing particularly on the case of small hole doping. From the behavior of the time-dependent diffusion coefficient and the diffusion length, we verify that the system exhibits Anderson's localization due to quasi-one-dimensionality of nanotubes. Moreover, we reveal the dependence of impurity-potential strength on the localization length, and consequently we demonstrate that the localization can occur even at room temperature, which is consistent with the recent experimental results.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.52.06GD07