Chirality dependence of exciton effects in single-wall carbon nanotubes: Tight-binding model

J. Jiang, R. Saito, Ge G. Samsonidze, A. Jorio, S. G. Chou, G. Dresselhaus, M. S. Dresselhaus

Research output: Contribution to journalArticlepeer-review

212 Citations (Scopus)

Abstract

We have studied the exciton properties of single-wall carbon nanotubes by solving the Bethe-Salpeter equation within tight-binding models. The screening effect of the π electrons in carbon nanotubes is treated within the random phase and static screened approximations. The exciton wave functions along the tube axis and circumference are discussed as a function of (n,m). A 2n+m=const family behavior is found in the exciton wave function length, excitation energy, binding energy, and environmental shift. This family behavior is understood in terms of the trigonal warping effect around the K point of a graphene layer and curvature effects. The large family spread in the excitation energy of the Kataura plot is found to come from the single-particle energy.

Original languageEnglish
Article number035407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number3
DOIs
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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