Chirality dependence of the dielectric constant for the excitonic transition energy of single-wall carbon nanotubes

P. T. Araujo, Nugraha Ahmad Ridwan Tresna, K. Sato, M. S. Dresselhaus, Riichiro Saito, A. Jorio

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Attention has been devoted recently to understand the physics behind the dielectric screening of the carbon nanotube optical transitions (Eii), including how a changing environment changes Eii. It was shown that the environmental screening could be modeled by an effective diameter dependent dielectric constant κ, which takes into account contributions from the single-wall carbon nanotube (SWNT) itself and from the environment surrounding the tube. Here we consider the chiral angle (θ) dependence of κ which improves the previous fitting by only the diameter dependence and we can now see the difference between EM11and ES22 by the present treatment. In this work we used the "alcohol-assisted" and the "super-growth" SWNT samples to address this point.

Original languageEnglish
Pages (from-to)2847-2850
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume247
Issue number11-12
DOIs
Publication statusPublished - 2010 Dec 1

Keywords

  • Carbon nanotubes
  • Dielectric screening
  • Energy transitions
  • Excitons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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