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

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

Nano Letters, cilt.15, sa.8, ss.5248-5253, 2015 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 8
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1021/acs.nanolett.5b01506
  • Dergi Adı: Nano Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5248-5253
  • Anahtar Kelimeler: Carbon nanotube, Kelvin probe force microscopy, defect scattering, point defect, LUTTINGER-LIQUID, CARBON NANOTUBES, TRANSPORT, MICROSCOPY, SPECTROSCOPY, BEHAVIOR, STATE
  • Ankara Hacı Bayram Veli Üniversitesi Adresli: Hayır

Özet

© 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.