Resonant-Raman intensities and transition energies of the E-11 transition in carbon nanotubes
Telg H, Maultzsch J, Reich S, Thomsen C (2006)
Publication Status: Published
Publication Type: Journal article
Publication year: 2006
Journal
Publisher: AMERICAN PHYSICAL SOC
Book Volume: 74
Journal Issue: 11
DOI: 10.1103/PhysRevB.74.115415
Abstract
We observed the lowest optical transitions (E-11(S)) in separated carbon nanotubes by resonant Raman spectroscopy. Radial breathing mode spectra were collected varying the excitation energy in the near-infrared from 1.15 to 1.48 eV. From resonance profiles we obtained the E-11(S) energies of 11 nanotubes, extending the experimental Kataura plot. Strong Raman signal from tubes with nu=(n-m)mod3=+1 and from tubes that were absent in photoluminescence support the theory of exciton resonance. The measured Raman intensities agree well with the calculated optical absorption and electron-phonon coupling obtained with first-principles and empirical methods. A remaining factor of similar to 3 can be due to a higher abundance of armchairlike tubes or differences of the absorption and vibrational coupling between correlated (excitons) and uncorrelated electron-hole pairs.
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APA:
Telg, H., Maultzsch, J., Reich, S., & Thomsen, C. (2006). Resonant-Raman intensities and transition energies of the E-11 transition in carbon nanotubes. Physical Review B, 74(11). https://dx.doi.org/10.1103/PhysRevB.74.115415
MLA:
Telg, Hagen, et al. "Resonant-Raman intensities and transition energies of the E-11 transition in carbon nanotubes." Physical Review B 74.11 (2006).
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