We report calculations of resonant Raman scattering spectra of trans-(CD${)}_{\mathrm{x}}$ which are in very good agreement with the experimental data. The theory is based on the hypothesis that trans-(CD${)}_{\mathrm{x}}$, like trans-(CH${)}_{\mathrm{x}}$, consists of different conjugation-length segments, weighted by a bimodal Gaussian distribution. The lattice dynamics and the electron vibration properties of trans-(CD${)}_{\mathrm{x}}$ are investigated. Finally, this model is extensively discussed in comparison with that based on amplitude modes associated with Peierls gaps of different energies.

• Received 3 October 1984

DOI:https://doi.org/10.1103/PhysRevB.31.4015