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Ultrafast coherent phonon dynamics in metallic single-walled carbon nanotubes

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Abstract

We report the first observation of coherent phonons in separated metallic single-walled carbon nanotubes (SWCNTs). Due to structure-dependent electron-phonon couplings, radial breathing phonon mode is hardened with photo-carriers in metallic but not in semiconducting SWCNTs.

© 2010 Optical Society of America

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