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Olejniczak, I., Gromadzinski, B., Graja, A., Devic, T. & Batail, P. (2006) Optical study of the metal-insulator phase transition in beta-(EDT-TTF-I-2)(2)(Pb-5/6 rectangle I-1/6(2))(3) and beta-(EDT-TTF-I-2)(2) (Pb2/3+xAg1/3-2x rectangle I-x(2))(3) one-dimensional organic conductors. CHEMICAL PHYSICS, 326 409–416.
Added by: Richard Baschera (2017-03-01 08:48:24) |
| Type de référence: Article DOI: {10.1016/j.chemphys.2006.02.029} Numéro d'identification (ISBN etc.): {0301-0104} Clé BibTeX: Olejniczak{2006} Voir tous les détails bibliographiques  |
Catégories: HORSIMN Créateurs: Batail, Devic, Graja, Gromadzinski, Olejniczak Collection: {CHEMICAL PHYSICS} |
Consultations : 1/443
Indice de consultation : 3% Indice de popularité : 0.75% |
| Résumé |
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{We report the polarized infrared reflectance and absorption spectra of the two radical cation salts beta-(EDT-TTF-I-2)2(Pb-5/6 square L I-1/6(2))(3) and beta-(EDT-TTF-I-2)(2)(Pb2/3+xAg1/3-2x square x I-2)(3), where x = 0.05 and square - vacancy, from room temperature down to 10 K. Both materials display metallic response characteristic for quasi-one-dimensional organic conductors. The single crystal polarized absorption spectra display a number of vibrational features related to intramolecular modes of the EDT-TTF-I-2 molecule. The 70 K metal-insulator phase transition has a modest influence on the infrared spectra of both materials. The temperature dependence of the electron-molecular vibration (EMV)-activated stretching C=C mode of EDT-TTF-I-2 suggests, that the charge density wave (CDW) fluctuations appear in both materials above the phase transition temperature. The temperature evolution of the reflectance spectra is analyzed using Drude model. (c) 2006 Elsevier B.V. All rights reserved.}
Added by: Richard Baschera |