Observation of exciton-phonon sideband in individual metallic single-walled carbon nanotubes.
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.
Zeng
Hualing
H
Department of Physics, The University of Hong Kong, Hong Kong, China.
Zhao
Hongbo
H
Zhang
Fu-Chun
FC
Cui
Xiaodong
X