Phonon spectrum of double-wall carbon nanotubes |
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Authors: | G. S. Ivanchenko N. G. Lebedev |
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Affiliation: | (1) Volgograd State University, ul. Prodol’naya 30, Volgograd, 400062, Russia |
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Abstract: | The results of studying the phonon spectra of carbon nanotubes within the framework of the periodic-cluster model are presented. Special attention is paid to the phonon spectrum of double-wall nanotubes. It is shown that the spectrum is separated into two subbands corresponding to the acoustic and optical vibrational modes. A specific feature of the phonon dispersion curves is their “doublet” character. The spectrum has an acoustic mode corresponding to longitudinal oscillations of the two walls of a double-wall carbon nanotube with respect to each other. |
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