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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 | Abstract: | We 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 | Services: | Forum | Review | PDF | Favorites |
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