Origin of the ..... The D band of bundle of single wall carbon nanotubes (SWCNTs) consists of more than one subband according to experiments. Using the double resonance theory, it was demonstrated that this fine structure can be obtained by using a model phonon dispersion which was sufficiently anisotropic around the K point, and have shown that this model dispersion was a physically good approximation by comparing it with high-precision DFT calculations. It was shown that the presence of Van Hove singularities, the high variety of different SWCNTs in the sample, the trigonal warping effect of the phonon dispersion altogether were responsible for the fine structure of the D band.
|Journal||Physical review letters|
|Publication status||Published - Apr 18 2003|
ASJC Scopus subject areas
- Physics and Astronomy(all)