We present experimental measurements of the electronic contribution to the Raman spectra of individual metallic single-walled carbon nanotubes (MSWNTs). Photoexcited carriers are inelastically scattered by a continuum of low-energy electron-hole pairs created across the graphenelike linear electronic subbands of the MSWNTs. The optical resonances in MSWNTs give rise to well-defined electronic Raman peaks. This resonant electronic Raman scattering is a unique feature of the electronic structure of these one-dimensional quasimetals.
@article{arxiv.1110.4356,
title = {Observation of Electronic Raman Scattering in Metallic Carbon Nanotubes},
author = {Hootan Farhat and Stéphane berciaud and Martin Kalbac and Riichiro Saito and Tony F. Heinz and Mildred S. Dresselhaus and Jing Kong},
journal= {arXiv preprint arXiv:1110.4356},
year = {2011}
}