Electronic and vibrational absorption spectra in DMtTCF and TMTCT salts : Estimation for electronic correlations

✍ Scribed by P. Delhaes; C. Garrigou-Lagrange; J.M. Fabre

• Book ID: 103890882
• Publisher: Elsevier Science
• Year: 1986
• Weight: 178 KB
• Volume: 143
• Category: Article
• ISSN: 0378-4363
• DOI: 10.1016/0378-4363(86)90173-7

✦ Synopsis

The electronic and vibrational absorption spectra have been recorded on several TMTCF and DMtTCF salts, between 15Kand 300K, in the infrared range. A quantitative approach is proposed to interpret these observations : i) Vibronic lines are observed at any temperature in both the DMtTCF and the TMTCF series ; they indicate the presence of electron phonon interactions as formally described by Rice's dimer model.

ii) The intense charge transfer band associated with mixed-valence systems in sulfur compounds can be fitted using a classical Drude-Lorentz model. A physical meaning of the involved parameters associated with this fit is proposed using an extended Id Hubbard model.