title: 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 backscattering 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.
authors.affiliation: Department of Physics, The University of Hong Kong, Hong Kong, China.
authors.forename: Hualing
authors.initials: H
authors.lastname: Zeng
authors.forename: Hongbo
authors.initials: H
authors.lastname: Zhao
authors.forename: Fu-Chun
authors.initials: FC
authors.lastname: Zhang
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Cui