Relaxation dynamics of majority and minority electrons after ultrashort laser excitation

Abstract

We analyze the ultrafast demagnetization after ultrashort laser excitation by a kinetic model based on Elliott-Yafet scattering processes. By applying complete Boltzmann scattering integrals we trace the majority and minority electrons as well as phonons in the sample. Additionally, we allow for dynamical changes in the exchange splitting between majority and minority electrons. We find that our model has the potential to describe the magnetization dynamics and provides insights in the relaxation dynamics of the non-equilibrium electron system.