Abstract
The Raman spectra of the disorder-induced D-band and some other
non-zone-center phonon modes of graphite and single wall carbon
nanotubes are discussed using double resonance Raman theory. For
two-dimensional disordered graphite, two D-band peaks and one G'-band
peak are predicted. The trigonal warping effect of the constant energy
contours in graphite and the van Hove singularities in the electronic
and phonon energy dispersion of carbon nanotubes are of importance for
discussing the line width and possible numbers of Raman peaks which come
from inequivalent Raman processes.
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