Hot-Phonon Effects in a Quantum Kinetic Model for the Relaxation of Photoexcited Carriers

Abstract

In solid state physics the microscopic quasiparticle dynamics are usually described by the semiclassical Boltzmann equation. There, by using the completed collision approximation, scattering processes are treated as instantaneous in space and time and the single-particle energy is conserved in each process. On short length and time scales quantum effects enter the description of the dynamics. A well-known example is the generation of electron-hole pairs as described by the semiconductor Bloch equation. Within this concept the correlation between electrons and holes is described by the interband polarization and coherent effects are taken into account.¹