Curvature effects in the D* band of small diameter carbon nanotubes

J. Kürti, V. Zólyomi, J. Koltai, F. Simon, R. Pfeiffer, H. Kuzmany

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The energy dispersion of the D* (G') band shows a strong diameter dependence according to Raman measurements on double walled carbon nanotubes. The Raman shift of the small diameter inner tubes shows an average softening. There is an oscillation around an average linear behavior with slopes of 108 cm-1/eV and 61 cm-1/eV for the outer and inner tubes, respectively. We show that the experimental observation can be reproduced by simple model calculations if the curvature effects are taken into account. The phonon softening with increasing curvature was proven by first principles calculations.

Original languageEnglish
Pages (from-to)4261-4264
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume244
Issue number11
DOIs
Publication statusPublished - Nov 1 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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