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On the Electron−Phonon Coupling of Individual Single-Walled Carbon Nanotubes

Oron-Carl, Matti and Hennrich, Frank and Kappes, Manfred M. and Löhneysen, Hilbert v. and Krupke, Ralph (2005):
On the Electron−Phonon Coupling of Individual Single-Walled Carbon Nanotubes.
In: Nano Letters, 5 (9), pp. 1761-1767, ISSN 1530-6984,
[Online-Edition: http://dx.doi.org/10.1021/nl051107t],
[Article]

Abstract

We show that the phonon coupling to the electronic system in individual metallic single-walled carbon nanotubes is not due to coupling to low-energy plasmons. The evidence stems from the measured Raman-Stokes G-mode, which for metallic and semiconducting tubes could be fitted well by the superposition of only two Lorentzian lines associated with vibrational modes along the nanotube axis and the nanotube circumference. In the case of metallic tubes the lower-energy G mode is significantly broadened, however maintaining the Lorentzian line shape, in contrast to the theoretically expected asymmetric Breit−Wigner−Fano line shape from phonon-plasmon coupling. The results were obtained by studying 25 individual metallic and semiconducting single-walled carbon nanotubes with atomic force microscopy, electron transport measurements, and resonant Raman spectroscopy.

Item Type: Article
Erschienen: 2005
Creators: Oron-Carl, Matti and Hennrich, Frank and Kappes, Manfred M. and Löhneysen, Hilbert v. and Krupke, Ralph
Title: On the Electron−Phonon Coupling of Individual Single-Walled Carbon Nanotubes
Language: English
Abstract:

We show that the phonon coupling to the electronic system in individual metallic single-walled carbon nanotubes is not due to coupling to low-energy plasmons. The evidence stems from the measured Raman-Stokes G-mode, which for metallic and semiconducting tubes could be fitted well by the superposition of only two Lorentzian lines associated with vibrational modes along the nanotube axis and the nanotube circumference. In the case of metallic tubes the lower-energy G mode is significantly broadened, however maintaining the Lorentzian line shape, in contrast to the theoretically expected asymmetric Breit−Wigner−Fano line shape from phonon-plasmon coupling. The results were obtained by studying 25 individual metallic and semiconducting single-walled carbon nanotubes with atomic force microscopy, electron transport measurements, and resonant Raman spectroscopy.

Journal or Publication Title: Nano Letters
Volume: 5
Number: 9
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 08 Nov 2011 12:57
Official URL: http://dx.doi.org/10.1021/nl051107t
Identification Number: doi:10.1021/nl051107t
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