Electronic transition energy E-ii for an isolated (n,m) single-wall carbonnanotube obtained by anti-Stokes/Stokes resonant Raman intensity ratio - art. no. 241404
Ag. Souza et al., Electronic transition energy E-ii for an isolated (n,m) single-wall carbonnanotube obtained by anti-Stokes/Stokes resonant Raman intensity ratio - art. no. 241404, PHYS REV B, 6324(24), 2001, pp. 1404
A resonant Raman study of the anti-Stokes and Stokes spectra for individual
isolated single-wall carbon nanotubes is presented. The observed asymmetry
between the anti-Stokes and Stokes spectra is analyzed within the framewor
k of resonant Raman scattering theory, thereby providing a method for accur
ately determining the transition energy between van Hove singularities E-ii
in the electronic density of states and unambiguously assigning the (n,m)
nanotube indices. Furthermore, resonant Raman theory allows us to determine
whether the resonance is with the incident or scattered photon, and to est
imate the relative magnitudes of the matrix elements for the G-band and the
radial breathing mode Raman processes.