Dispersive Raman spectra observed in graphite and single wall carbon nanotubes

R. Saito, A. Jorio, A. G. Souza Filho, A. Grueneis, M. A. Pimenta, G. Dresselhaus, M. S. Dresselhaus

Research output: Contribution to journalConference articlepeer-review

63 Citations (Scopus)

Abstract

The disorder-induced D-band and some other non-zone center Raman modes of graphite and single wall carbon nanotubes are assigned to phonon modes in their respective Brillouin zones. In disordered graphite, the weak, dispersive phonon modes, which have been known but never assigned so far, are well described by the double resonance Raman process. All weak Raman peaks observed for sp2 carbons are useful for determining the phonon dispersion relations of graphite. In carbon nanotubes, all semiconducting nanotubes and some metallic nanotubes have van Hove singular k points for their electronic and phonon energy dispersion curves at the Γ point of the Brillouin zone. A corresponding Raman process is relevant to explain the observed D-band and intermediate frequency spectra.

Original languageEnglish
Pages (from-to)100-106
Number of pages7
JournalPhysica B: Condensed Matter
Volume323
Issue number1-4
DOIs
Publication statusPublished - 2002 Oct 1
Externally publishedYes
EventProceedings of the Tsukuba Symposium on Carbon Nanotube in Com (CNT10) - Tsukuba, Japan
Duration: 2001 Oct 32001 Oct 5

Keywords

  • Carbon nanotubes
  • D-band
  • Dispersive phonon mode
  • Double resonance
  • Raman spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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