Strain-induced interference effects on the resonance Raman cross section of carbon nanotubes

In this Letter, we report the effects of strain on the electronic properties of single-wall carbon nanotubes. When we normalize the electronic transition energies to the corresponding values obtained for unstrained tubes, we obtain that, regardless of the tube diameter, all the data collapse onto un...

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Veröffentlicht in:Physical review letters 2005-11, Vol.95 (21), p.217403-217403, Article 217403
Hauptverfasser: Souza Filho, A G, Kobayashi, N, Jiang, J, Grüneis, A, Saito, R, Cronin, S B, Mendes Filho, J, Samsonidze, Ge G, Dresselhaus, G, Dresselhaus, M S
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Sprache:eng
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Zusammenfassung:In this Letter, we report the effects of strain on the electronic properties of single-wall carbon nanotubes. When we normalize the electronic transition energies to the corresponding values obtained for unstrained tubes, we obtain that, regardless of the tube diameter, all the data collapse onto universal curves following an n - m = constant family pattern. In the case of metallic tubes, quantum interference effects on the Raman cross section are predicted for strained tubes when the energies of the lower and the upper components have nearly the same values. Experimental evidence for the strain-induced Raman cross section changes is observed in single nanotube spectroscopy.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.95.217403