COUPLING OF ELECTRONS TO LOW-FREQUENCY PHONONS IN CATION-RADICAL SALTS OF TTF STUDIED BY RESONANCE RAMAN-SCATTERING

Authors
SPEGHINI A PEDRON D BELLITTO C FELTRE L BOZIO R
Citation
A. Speghini et al., COUPLING OF ELECTRONS TO LOW-FREQUENCY PHONONS IN CATION-RADICAL SALTS OF TTF STUDIED BY RESONANCE RAMAN-SCATTERING, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 234, 1993, pp. 219-226
Citations number
10
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
234
Year of publication
1993
Pages
219 - 226
Database
ISI
SICI code
1058-725X(1993)234:<219:COETLP>2.0.ZU;2-7
Abstract
We report results obtained by measuring the low frequency (40-150 cm-1 ) resonance Raman scattering (RRS) spectra and excitation profiles of the cation radical salt (TTF)2(W6O19) whose structure consists of almo st isolated (TTF+)2 dimers that are characterized by a CT absorption b and at 850 nm. Quantitative analysis of the RRS data has been performe d based on a Peierls-Hubbard model for an isolated dimer. The paramete rs required for the calculation of the RRS data are derived analytical ly from the microscopic parameters of the Peierls-Hubbard Hamiltonian, which include the intermolecular (EIP) coupling constants. The excita tion profiles have been calculated using the time correlator technique and their fitting provides the first experimental estimates of the EI P coupling constants.