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Resonant anti-Stokes Raman scattering in single-walled carbon nanotubes

Gordeev, Georgy and Jorio, Ado and Kusch, Patryk and Vieira, Bruno G. M. and Flavel, Benjamin and Krupke, Ralph and Barros, Eduardo B. and Reich, Stephanie (2017):
Resonant anti-Stokes Raman scattering in single-walled carbon nanotubes.
96, In: Physical Review B, (24), American Physical Society, p. 245415, ISSN 2469-9950, DOI: 10.1103/PhysRevB.96.245415,
[Online-Edition: https://doi.org/10.1103/PhysRevB.96.245415],
[Article]

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.

Item Type: Article
Erschienen: 2017
Creators: Gordeev, Georgy and Jorio, Ado and Kusch, Patryk and Vieira, Bruno G. M. and Flavel, Benjamin and Krupke, Ralph and Barros, Eduardo B. and Reich, Stephanie
Title: Resonant anti-Stokes Raman scattering in single-walled carbon nanotubes
Language: English
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.

Journal or Publication Title: Physical Review B
Volume: 96
Number: 24
Publisher: American Physical Society
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Molekulare Nanostrukturen
Date Deposited: 07 Feb 2018 06:43
DOI: 10.1103/PhysRevB.96.245415
Official URL: https://doi.org/10.1103/PhysRevB.96.245415
Funders: 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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