Oron-Carl, Matti ; Hennrich, Frank ; Kappes, Manfred M. ; Löhneysen, Hilbert v. ; Krupke, Ralph (2005)
On the Electron−Phonon Coupling of Individual Single-Walled Carbon Nanotubes.
In: Nano Letters, 5 (9)
doi: 10.1021/nl051107t
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2005 |
| Autor(en): | Oron-Carl, Matti ; Hennrich, Frank ; Kappes, Manfred M. ; Löhneysen, Hilbert v. ; Krupke, Ralph |
| Art des Eintrags: | Bibliographie |
| Titel: | On the Electron−Phonon Coupling of Individual Single-Walled Carbon Nanotubes |
| Sprache: | Englisch |
| Publikationsjahr: | 19 August 2005 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nano Letters |
| Jahrgang/Volume einer Zeitschrift: | 5 |
| (Heft-)Nummer: | 9 |
| DOI: | 10.1021/nl051107t |
| Kurzbeschreibung (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. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 08 Nov 2011 12:57 |
| Letzte Änderung: | 05 Mär 2013 09:55 |
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