Interplay of electron-phonon nonadiabaticity and Raman scattering in the wavepacket dynamics of electron-phonon-photon systems

TL;DR

This study investigates how electron-phonon nonadiabaticity and Raman scattering influence ultrafast wavepacket dynamics in electron-phonon-photon systems, highlighting their combined effect near conical intersections for understanding femtosecond photoexcitation processes.

Contribution

It reveals the significant role of Raman scattering in the wavepacket dynamics when electron-phonon nonadiabaticity is considered, especially near conical intersections.

Findings

Raman scattering critically affects wavepacket motion.

Electron-phonon nonadiabaticity influences system dynamics.

Interplay determines photoexcitation/deexcitation processes.

Abstract

Ultrafast wavepacket dynamics of electron-phonon-photon systems is studied by numerical calculations. When nonadiabaticity of electron-phonon systems is taken into account, Raman scattering process plays an important role in the dynamics of the system. We found that the interplay of the electron-phonon nonadiabaticity and the Raman scattering determines the wavepacket motion particularly in the vicinity of the conical intersection of adiabatic potential energy surfaces, which shows that we should consider this effect in order to reveal the photoexcitation/deexcitation process of materials in femtosecond time scale.