Collective excitations in a single-layer carbon nanotube

M. Lin, D. Chuu, C. Huang, Y. Lin, K. W.K. Shung

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)


The inter-π-band response function of a single-layer carbon nanotube is calculated within the random-phase approximation. Such a cylindrical system exhibits rich inter-π-band excitations. The decoupled π plasmons of different angular momenta (L’s) strongly depend on the transferred momenta (q’s). Furthermore, they exhibit a dimensionality crossover as the nanotube radius is increased. For small q’s and L’s, the π plasmon frequency is ∼6-8 eV, which is insensitive to the nanotube geometry such as the radius and chiral angle. Comparison with recent experiments is discussed.

Original languageEnglish
Pages (from-to)15493-15496
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number23
Publication statusPublished - 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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