Double resonant raman phenomena enhanced by van Hove singularities in single-wall carbon nanotubes

J. Kürti, V. Zólyomi, A. Grüneis, H. Kuzmany

Research output: Contribution to journalArticle

144 Citations (Scopus)

Abstract

The behavior of the disorder-induced D band in the Raman spectrum of single-wall carbon nanotubes (SWCNT's) was investigated both theoretically and experimentally. The measured maximum position of the D band for SWCNT bundles exhibits an oscillation superimposed on a linear shift, when the laser excitation energy Elaser varies in the range of 1.6-2.8 eV. We have shown theoretically by explicit integrations for the resonant Raman cross section that the D-band intensity of an isolated SWCNT has a sharp maximum when Elaser of either the incoming or the scattered photon matches a van Hove singularity in the joint density of states. This "resonance" must be considered in addition to the double resonance from a scattering by an impurity. Calculating the D band of a superposition of all the 114 SWCNT's within a given diameter range, both the shift and the oscillation in the experimentally observed spectra were reproduced.

Original languageEnglish
Article number165433
Pages (from-to)1654331-1654339
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number16
DOIs
Publication statusPublished - Apr 15 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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