S. Kruszewski et al., SELECTIVE RESONANCE RAMAN-SCATTERING OF PEIERLS-HUBBARD (TTF+)2 DIMERS IN (TTF)2MO6O19 AND (TTF)2W6O19 SALTS, Acta Physica Polonica. A, 83(4), 1993, pp. 431-440
Raman investigation of Peierls-Hubbard (TTF+)2 dimers in (TTF)2Mo6O19
and (TTF)2W6O19 Salts have been performed. It was found that the reson
ance enhancement of Raman intensity of intramolecular vibration modes
exists only when the frequency of excitation light fits to the localis
ed electron transition, however, the resonance enhancement of intermol
ecular modes occurs when the frequency of excitation light corresponds
to the charge transfer transition.