Quantum dots from carbon nanotube junctions

Fabrizio Cleri, Pawel Keblinski, Inkook Jang, Susan B. Sinnott

Research output: Contribution to journalConference articlepeer-review

Abstract

A tight-binding hamiltonian is used to study the electronic properties of covalently-bonded, crossed (5,5) metallic nanotubes with increasing degree of disorder in the junction region. At one extreme, ideal junctions between coplanar nanotubes with a minimal number of topological defects show a good ohmic behavior. Upon increasing disorder, ohmic conduction is suppressed in favor of hopping conductivity. At the opposite extreme, strongly disordered junctions as could be obtained after electron-beam irradiation of overlayed nanotubes, display weak localization and energy quantization, indicating the formation of a quantum dot contacted to metallic nanowires by tunnel barriers.

Original languageEnglish (US)
Pages (from-to)417-423
Number of pages7
JournalMaterials Research Society Symposium - Proceedings
Volume789
DOIs
StatePublished - 2003
EventQuantum Dots, Nanoparticles and Nanowires - Boston, MA, United States
Duration: Dec 1 2003Dec 5 2003

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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