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

研究成果: Article査読

219 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号035407
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
75
3
DOI
出版ステータスPublished - 2007

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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