Fermi energy dependence of the G-band resonance Raman spectra of single-wall carbon nanotubes

The Fermi energy dependence of the G-band resonance Raman spectra of single-wall carbon nanotubes (SWNTs) is calculated, including the Kohn anomaly effect for metallic tubes. The gate voltage dependence of the G-band Raman spectra for SWNTs shows chirality-dependent G(+)/G(-) spectra, reflecting their dependence on the eigenvector direction of the optical (LO and TO) phonon modes and the nanotube chirality.