Low-frequency excitation spectra in double-walled armchair carbon nanotubes

Y. H. Ho, G. W. Ho, S. C. Chen, J. H. Ho, M. F. Lin

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The low-frequency electronic excitations of the double-walled armchair carbon nanotubes are investigated by the random-phase approximation. Both the intertube atomic hoppings and the intertube e-e interactions are included in the calculations simultaneously. The intertube atomic hoppings significantly alter the low-energy bands and thus enrich the low-frequency excitation spectra. There are more single-particle excitation channels and plasmon modes. These excitations strongly depend on the symmetric configurations of the double-walled system and the transferred momentum, such as the number, the existence, the strength, and the frequency of plasmon modes.

Original languageEnglish
Article number115422
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number11
Publication statusPublished - 2007 Sep 17

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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