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28 March 2024
 
  » arxiv » cond-mat/0506069

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Coulomb-blockade transport in quasi-one dimensional polymer nanofibers
A. N. Aleshin ; H. J. Lee ; S. H. Jhang ; H. S. Kim ; K. Akagi ; Y. W. Park ;
Date 3 Jun 2005
Journal Phys. Rev. B 72, 153202 (2005)
Subject Soft Condensed Matter; Other | cond-mat.soft cond-mat.other
AbstractWe report the low temperature current-voltage (I-V) characteristics studies in quasi-one dimensional conducting polymer nanofibers. We find a threshold voltage Vt below which little current flows at temperatures below 30-40 K. For V > Vt current scales as (V/Vt - 1)^zeta, where zeta ~ 1.8-2.1 at high biases. Differential conductance oscillations are found whose magnitude increases as temperature decreases below 10 K. We attribute the observed low temperature I-V behavior to Coulomb blockade effects with a crossover to Luttinger liquid-like behavior at high temperature. We demonstrate that at low temperatures such a doped conjugated polymer fiber can be considered as an array of small conducting regions separated by nanoscale barriers, where the Coulomb blockade tunneling is the dominant transport mechanism.
Source arXiv, cond-mat/0506069
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