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Title: | Raman excitation profiles of metallic single-walled carbon nanotubes | Authors: | Nikolić, Božidar | Issue Date: | 10-Mar-2010 | Journal: | Journal of physics. Condensed matter : an Institute of Physics journal | Abstract: | In this work Raman excitation profiles of metallic carbon nanotubes have been calculated and thoroughly analyzed. Suppression and vanishing of the high-energy resonance is completely confirmed by our calculations. The presented results clearly show that the suppression, and finally the absence, of the resonance is caused by electron-phonon interaction and interference effects. Electron-phonon coupling for low-energy resonance is significantly larger than for high-energy resonance. Furthermore, the transition energies of those two transitions are close enough to make interference effects important. The type of interference is determined by the sign of the electron-phonon interaction matrix elements. Constructive interference makes the low-energy resonance more intensive and destructive interference destroys the high-energy resonance for most of the metallic tubes. |
URI: | https://physrep.ff.bg.ac.rs/handle/123456789/702 | ISSN: | 0953-8984 | DOI: | 10.1088/0953-8984/22/9/095302 |
Appears in Collections: | Journal Article |
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