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

Abstract

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.

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

References in corpus (4)

• Electron-electron interaction effects on optical excitations in semiconducting single-walled carbon nanotubes
• Absorption spectroscopy of individual single-walled carbon nanotubes
• Universal properties of quasi-one-dimensional excitons in semiconducting single-walled carbon nanotubes and $\pi$-conjugated polymers
• Electron-electron interaction effects on the photophysics of metallic single-walled carbon nanotubes