Dispersive Raman spectra observed in graphite and single wall carbon nanotubes

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 d...

Full description

Saved in:
Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2002-10, Vol.323 (1), p.100-106
Main Authors: Saito, R., Jorio, A., Souza Filho, A.G., Grueneis, A., Pimenta, M.A., Dresselhaus, G., Dresselhaus, M.S.
Format: Article
Language:English
Subjects:
Carbon nanotubes
Condensed matter: structure, mechanical and thermal properties
D-band
Dispersive phonon mode
Double resonance
Exact sciences and technology
Lattice dynamics
Phonons in low-dimensional structures and small particles
Physics
Raman spectroscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 sp 2 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.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(02)00992-4