Exciton energy calculations for single wall carbon nanotubes

R. Saito, K. Sato, P. T. Araujo, A. Jorio, G. Dresselhaus, M. S. Dresselhaus

研究成果: Article

5 引用 (Scopus)

抜粋

Using the Bethe-Salpeter equation, we have calculated the exciton energies of (i) bright exciton states; (ii) 2g exciton energies; and (iii) the energy difference between dark and bright exciton states for single wall carbon nanotubes (SWNTs) as a function of diameter. By adjusting the dielectric constant, we can reproduce the observed exciton energies in the resonance Raman spectra and two-photon absorption spectra for SWNTs. The environmental effect on the transition energies can be explained by a diameter-dependent dielectric constant. However, the energy difference between the dark and bright exciton states cannot be reproduced simply by changing the dielectric constant consistently. Thus we need to consider the evaluation of the Coulomb interaction, especially with regard to the surrounding materials.

元の言語English
ページ(範囲)2581-2585
ページ数5
ジャーナルPhysica Status Solidi (B) Basic Research
246
発行部数11-12
DOI
出版物ステータスPublished - 2009 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Saito, R., Sato, K., Araujo, P. T., Jorio, A., Dresselhaus, G., & Dresselhaus, M. S. (2009). Exciton energy calculations for single wall carbon nanotubes. Physica Status Solidi (B) Basic Research, 246(11-12), 2581-2585. https://doi.org/10.1002/pssb.200982266