Defects, quasibound states, and quantum conductance in metallic carbon nanotubes

Hyoung Joon Choi, Jisoon Ihm, Steven G. Louie, Marvin L. Cohen

Research output: Contribution to journalArticle

477 Citations (Scopus)

Abstract

The effects of impurities and local structural defects on the conductance of metallic carbon nanotubes are calculated using an ab initio pseudopotential method within the Landauer formalism. Substitutionally doped boron or nitrogen produces quasibound impurity states of a definite parity and reduces the conductance by a quantum unit (2e 2/h) via resonant backscattering. These resonant states show strong similarity to acceptor or donor states in semiconductors. The Stone-Wales defect also produces quasibound states and exhibits quantized conductance reduction. In the case of a vacancy, the conductance shows a much more complex behavior than the prediction from the widely used π-electron tight-binding model.

Original languageEnglish
Article number2917
JournalPhysical Review Letters
Volume84
Issue number13
DOIs
Publication statusPublished - 2000 Mar 27

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this