One-Dimensional Poole-Frenkel Conduction in the Single Defect Limit


Pan D., Fuller E. J. , Guel O. T. , Collins P. G.

Nano Letters, vol.15, no.8, pp.5248-5253, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 8
  • Publication Date: 2015
  • Doi Number: 10.1021/acs.nanolett.5b01506
  • Journal Name: Nano Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.5248-5253
  • Keywords: Carbon nanotube, Kelvin probe force microscopy, defect scattering, point defect, LUTTINGER-LIQUID, CARBON NANOTUBES, TRANSPORT, MICROSCOPY, SPECTROSCOPY, BEHAVIOR, STATE
  • Ankara Haci Bayram Veli University Affiliated: No

Abstract

© 2015 American Chemical Society.A single point defect surrounded on either side by quasi-ballistic, semimetallic carbon nanotube is a nearly ideal system for investigating disorder in one-dimensional (1D) conductors and comparing experiment to theory. Here, individual single-walled nanotubes (SWNTs) are investigated before and after the incorporation of single point defects. Transport and local Kelvin Probe force microscopy independently demonstrate high-resistance depletion regions over 1.0 ∼m wide surrounding one point defect in semimetallic SWNTs. Transport measurements show that conductance through such wide depletion regions occurs via a modified, 1D version of Poole-Frenkel field-assisted emission. Given the breadth of theory dedicated to the possible effects of disorder in 1D systems, it is surprising that a Poole-Frenkel mechanism appears to describe defect scattering and resistance in this semimetallic system.