Research Article

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

Department of Electrical and Electronic Engineering, School of Engineering and Center for Optical Research and Education, Utsunomiya University 7-1-2 Yoto, Utsunomiya, Tochigi 321-8585, Japan

^a e-mail: ishd_kn@cc.utsunomiya-u.ac.jp

Received: 11 August 2019
Received in final form: 27 March 2019
Published online: 11 June 2019

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. The interplay of the electron-phonon nonadiabaticity and the Raman scattering is found to determine the wavepacket motion particularly in the vicinity of the conical intersection of adiabatic potential energy surfaces, which shows that this effect should be considered in order to reveal the photoexcitation/deexcitation process of materials in femtosecond time scale.