Gordeev, Georgy ; Jorio, Ado ; Kusch, Patryk ; Vieira, Bruno G. M. ; Flavel, Benjamin ; Krupke, Ralph ; Barros, Eduardo B. ; Reich, Stephanie (2017)
Resonant anti-Stokes Raman scattering in single-walled carbon nanotubes.
In: Physical Review B, 96 (24)
doi: 10.1103/PhysRevB.96.245415
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The dependence of the anti-Stokes Raman intensity on the excitation laser energy in carbon nanotubes is studied by resonant Raman spectroscopy. The complete resonant anti-Stokes and Stokes Raman profiles of the high-energy longitudinal phonon (G+) are obtained for (8,3), (7,5), (6,4), and (6,5) single chirality enriched samples. A high asymmetry between the intensity of the incoming and outgoing resonance is observed in the resonant Raman profiles. In contrast to Stokes scattering, anti-Stokes scattering is more intense at the outgoing resonance then at the incoming resonance. The resonance profiles are explained by a Raman process that includes the phonon-mediated interactions with the dark excitonic state. The chirality dependence of the Raman profiles is due to the variation in the exciton-phonon matrix elements, in agreement with tight-binding calculations. Based on the asymmetric Raman profiles we present the resonance factors for the Stokes/anti-Stokes ratios in carbon nanotubes.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Gordeev, Georgy ; Jorio, Ado ; Kusch, Patryk ; Vieira, Bruno G. M. ; Flavel, Benjamin ; Krupke, Ralph ; Barros, Eduardo B. ; Reich, Stephanie |
| Art des Eintrags: | Bibliographie |
| Titel: | Resonant anti-Stokes Raman scattering in single-walled carbon nanotubes |
| Sprache: | Englisch |
| Publikationsjahr: | 18 Dezember 2017 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 96 |
| (Heft-)Nummer: | 24 |
| DOI: | 10.1103/PhysRevB.96.245415 |
| URL / URN: | https://doi.org/10.1103/PhysRevB.96.245415 |
| Kurzbeschreibung (Abstract): | The dependence of the anti-Stokes Raman intensity on the excitation laser energy in carbon nanotubes is studied by resonant Raman spectroscopy. The complete resonant anti-Stokes and Stokes Raman profiles of the high-energy longitudinal phonon (G+) are obtained for (8,3), (7,5), (6,4), and (6,5) single chirality enriched samples. A high asymmetry between the intensity of the incoming and outgoing resonance is observed in the resonant Raman profiles. In contrast to Stokes scattering, anti-Stokes scattering is more intense at the outgoing resonance then at the incoming resonance. The resonance profiles are explained by a Raman process that includes the phonon-mediated interactions with the dark excitonic state. The chirality dependence of the Raman profiles is due to the variation in the exciton-phonon matrix elements, in agreement with tight-binding calculations. Based on the asymmetric Raman profiles we present the resonance factors for the Stokes/anti-Stokes ratios in carbon nanotubes. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen |
| Hinterlegungsdatum: | 07 Feb 2018 06:43 |
| Letzte Änderung: | 20 Dez 2018 14:24 |
| PPN: | |
| Sponsoren: | We gratefully acknowledge the German Research Foundation (DFG via SFB 658, subproject A6). A.J. acknowledges financial support from the Humboldt Foundation. E.B.B. and B.G.M.V. acknowledge financial support from CAPES and CNPq. B.G.M.V. acknowledges, the Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior (CAPES) for the financial support under the program PDSE (Grant No. 88881.134611/2016-01) and Dahlem Research School, (DRS). |
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