摘要
The Raman scattering in polydiacetylene chains is investigated. For conjugated polymerchains, there is a large gap with discrete Raman active phonon modes in it which are notstrongly coupled to the electron system. It is, therefore, reasonable to restrict the treatmentto the first-order electron-phonon interaction. For emission of a single phonon, the cross-section is related to a 3-particle Green function that is derived from the Hartree-Fock andrandom phase approximation frame, the Raman scattering amplitude is calculated numeri-cally, and the results are compared with the experimental data.
The Raman scattering in polydiacetylene chains is investigated. For conjugated polymerchains, there is a large gap with discrete Raman active phonon modes in it which are notstrongly coupled to the electron system. It is, therefore, reasonable to restrict the treatmentto the first-order electron-phonon interaction. For emission of a single phonon, the cross-section is related to a 3-particle Green function that is derived from the Hartree-Fock andrandom phase approximation frame, the Raman scattering amplitude is calculated numeri-cally, and the results are compared with the experimental data.
