Selective Resonance Raman Scattering of Peierls-Hubbard (TTF+)2 Dimers in (TTF)2Mo6O19 and (TTF)2W6O19 Salts
S. Kruszewski
Institute of Mathematics and Physics, Academy of Technology and Agriculture, S. Kaliskiego 7, 85-790 Bydgoszcz, Poland

L. Feltre, R. Bozio
Department of Physical Chemistry, University of Padova, 2, Via Loredan, 35131 Padova, Italy

and C. Bellitto
I.T.S.E., C.N.R., Area della Ricerca di Roma, C.P., 10 Via Salaria km. 29.5, 00016 Monterotondo Stazione (Roma), Italy
Received: February 5, 1993
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Raman investigation of Peierls-Hubbard (TTF+)2 dimers in (TTF)2Mo6O19 and (TTF)2W6O19 salts have been performed. It was found that the resonance enhancement of Raman intensity of intramolecular vibration modes exists only when the frequency of excitation light fits to the localised electron transition, however, the resonance enhancement of intermolecular modes occurs when the frequency of excitation light corresponds to the charge transfer transition.
DOI: 10.12693/APhysPolA.83.431
PACS numbers: 34.70.+e, 78.30.-j