Optical Determination of Electron-Phonon Coupling in Carbon Nanotubes

Y. Yin, A. N. Vamivakas, A. G. Walsh, S. B. Cronin, M. S. Ünlü, B. B Goldberg, and A. K. Swan

Phys. Rev. Lett. 98, 037404 – Published 19 January 2007

Abstract

We report on an optical method to directly measure electron-phonon coupling in carbon nanotubes by correlating the first and second harmonic of the resonant Raman excitation profile. The method is applicable to 1D and 0D systems and is not limited to materials that exhibit photoluminescence. Experimental results for electron-phonon coupling with the radial breathing mode in 5 different nanotubes show coupling strengths from 3–11 meV. The results are in good agreement with the chirality and diameter dependence of the $e$ -ph coupling calculated by Goupalov et al.

Received 26 May 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.037404

Authors & Affiliations

Y. Yin¹, A. N. Vamivakas², A. G. Walsh¹, S. B. Cronin³, M. S. Ünlü^2,1, B. B Goldberg^1,2, and A. K. Swan²

¹Physics Department, Boston University, Boston, Massachusetts 02215, USA
²Electrical and Computer Engineering Department, Boston University, Boston, Massachusetts 02215, USA
³Electrical Engineering Department, University of Southern California, Los Angeles, California 90089, USA

Determination of Exciton-Phonon Coupling Elements in Single-Walled Carbon Nanotubes by Raman Overtone Analysis

Andrew P. Shreve, Erik H. Haroz, Sergei M. Bachilo, R. Bruce Weisman, Sergei Tretiak, Svetlana Kilina, and Stephen K. Doorn

Phys. Rev. Lett. 98, 037405 (2007)

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Vol. 98, Iss. 3 — 19 January 2007

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