Origin of electronic Raman scattering and the Fano resonance in metallic carbon nanotubes

Abstract

Fano resonance spectra for the G band in metallic carbon nanotubes are calculated as a function of laser excitation energy in which the origin of the resonance is given by an interference between the continuous electronic Raman spectra and the discrete phonon spectra. We found that the second-order scattering process of the non-zero q electron-electron interaction is more relevant to the continuous spectra rather than the q = 0 first-order process because the q = 0 direct Coulomb interaction vanishes due to the symmetry of the two sublattices of a nanotube. We also show that the RBM spectra of metallic carbon nanotubes have an asymmetric line shape which previously had been overlooked.

5 pages, 5 figures, submitted to Physical Review Letters on February 4, 2013

References in corpus (5)

• Phonon Linewidths and Electron Phonon Coupling in Nanotubes
• Diameter and Chirality Dependence of Exciton Properties in Carbon Nanotubes
• Cross-polarized optical absorption of single-walled nanotubes probed by polarized photoluminescence excitation spectroscopy
• Observation of Electronic Raman Scattering in Metallic Carbon Nanotubes
• Chirality dependent frequency shift of radial breathing mode in metallic carbon nanotubes

Cited by in corpus (5)

• Breit-Wigner-Fano lineshapes in Raman spectra of graphene
• Gate dependent electronic Raman scattering in graphene
• Electronic Raman Scattering in Suspended Semiconducting Carbon Nanotubes
• Emergent electronic insulating states in a one-dimensional moiré superlattice
• Insights into the need for ab-initio calculations to accurately predict the optical properties of metallic carbon nanotubes based on experimental confrontation