SKM 2021 – scientific programme

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MA: Fachverband Magnetismus

MA 15: Posters Magnetism IV

MA 15.6: Poster

Thursday, September 30, 2021, 13:30–16:30, P

Electron-magnon scattering dynamics in a two-band Stoner model — •Felix Dusabirane, Marius Weber, and Hans Christian Schneider — TU Kaiserslautern, Kaiserslautern, Germany

We theoretically study electronic scattering dynamics in a Stoner model with two spin-split bands. We include electron-magnon scattering together with Coulomb electron-electron scattering in order to describe incoherent hot-electron dynamics at sub-picosecond and picosecond timescales after ultrashort-pulse excitation in an itinerant ferromagnet. The optical excitation process is assumed to be instantaneous and the electronic dynamics is described at the level of equations of motion for momentum-dependent distribution functions together with time-dependent Fermi's Golden rule scattering rates. The magnons are treated as a bosonic bath.

We analyze the effect on the electronic spin-polarization dynamics of phase-space filling at different excitation conditions, as well as the magnitude of the Stoner splitting.