Resonance Raman scattering from phonon overtones in double-wall carbon nanotubes

R. Pfeiffer, H. Kuzmany, F. Simon, S. N. Bokova, E. Obraztsova

Research output: Contribution to journalArticle

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Abstract

The resonance behavior and the dispersion of the G′ line in double-wall carbon nanotubes were investigated by multifrequency Raman scattering. Using a large number of laser lines for excitation, the dispersion for the response from the inner tubes and from the outer tubes was found to be 85 and 99 cm-1 eV, respectively. The reduction of the dispersion for the inner tubes is a consequence of their high curvature and suggests a flattening of the phonon dispersion at the K point in the Brillouin zone. The frequency position for the G′ line of the inner tubes for a given laser energy was likewise strongly reduced as compared to values expected from tubes with standard diameter. This was again assigned to the strong curvature of the small-diameter inner tubes. Finally, the G′ line scattering cross sections for the outer tubes and for the inner tubes revealed resonances according to the transitions between the corresponding Van Hove singularities. The response from the inner tubes was particularly strong, in good agreement with the expected resonance enhancement resulting from their high curvature.

Original languageEnglish
Article number155409
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number15
DOIs
Publication statusPublished - 2005

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Carbon Nanotubes
resonance scattering
Raman scattering
Carbon nanotubes
carbon nanotubes
Raman spectra
tubes
harmonics
Lasers
curvature
Scattering
flattening
trucks
Brillouin zones
scattering cross sections
lasers
augmentation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Resonance Raman scattering from phonon overtones in double-wall carbon nanotubes. / Pfeiffer, R.; Kuzmany, H.; Simon, F.; Bokova, S. N.; Obraztsova, E.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 71, No. 15, 155409, 2005.

Research output: Contribution to journalArticle

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