Observation of Exciton-Phonon Sideband in Individual Metallic Single-Walled Carbon Nanotubes

Details Observation of Exciton-Phonon Sideband in Individual Metallic Single-Walled Carbon Nanotubes Observation of Exciton-Phonon Sideband in Individual Metallic Single-Walled Carbon Nanotubes

2008-12-12

arxiv.org/abs/0812.2293v2

Phys. Rev. Lett. 102, 136406 (2009)

Physics

Condensed Matter

Materials Science

5 pages, 3 figures; typos corrected, references updated, text re-arranged

Scientific paper

10.1103/PhysRevLett.102.136406

Single-walled carbon nanotubes (SWCNTs) are quasi-one-dimensional systems with poor Coulomb screening and enhanced electron-phonon interaction, and are good candidates for excitons and exciton-phonon couplings in metallic state. Here we report back scattering reflection experiments on individual metallic SWCNTs. An exciton-phonon sideband separated by 0.19 eV from the first optical transition peak is observed in a metallic SWCNT of chiral index (13,10), which provides clear evidences of excitons in metallic SWCNTs. A static dielectric constant of 10 is estimated from the reflectance spectrum.

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