Phonon control in metallic carbon nanotubes due to laser-induced defects
- International Graduate School of Arts and Sciences, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027 (Japan)
- Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan)
Single-walled carbon nanotubes (SWNTs) irradiated with laser were investigated by Raman spectroscopy. The intensity of D band related to defects increased with the laser irradiation. It should be noticed that the corresponding change was observed for G{sup -} peak associated with metallic SWNTs that is related to the electron-phonon coupling with Kohn anomaly. The upshift and narrowing of the G{sup -} peak occur due to the laser irradiation. The G{sup -} peak can recover the original one due to the thermal annealing. On the other hand, G band associated with semiconducting SWNTs remained unchanged even after the laser irradiation. This means that the laser-induced defects significantly affect phonons in metallic SWNTs, compared with semiconducting ones, and can control the electron-phonon coupling.
- OSTI ID:
- 21175633
- Journal Information:
- Applied Physics Letters, Vol. 93, Issue 13; Other Information: DOI: 10.1063/1.2990659; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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