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MA: Fachverband Magnetismus

MA 57: Posters Magnetism II

MA 57.14: Poster

Donnerstag, 19. März 2020, 15:00–18:00, P3

Hot carrier relaxation in two-dimensional materials — •Franz Fischer, Franziska Töpler, Nicki Frank Hinsche, Jürgen Henk, and Ingrid Mertig — Martin Luther University Halle-Wittenberg, Institute of Physics, 06099 Halle (Saale), Germany

Atomically thin layers of transition metal dichalcogenides attract remarkable interest due to their extraordinary electronic and optical properties. The lack of inversion symmetry in their crystal structure combined with strong spin-orbit interaction gives rise to an extra valley degree of freedom as well as large spin splittings in the Brillouin zone (BZ). The latter are accompanied by presumably large Berry curvature.

After gaining a net Berry curvature in the BZ by tuning the electronic band structure with electric and magnetic fields -- which induce spatial and time symmetry breaking -- we realized an anomalous Hall effect (AHE). We are developing a framework to study the time-dependent evolution of the AHE and other electronic transport properties in various 2D systems by solving time-dependent Boltzmann equation models. We aim to compare our results to those of theoretical and experimental many-temperature models to gain deeper insight into ultrafast carrier relaxation processes.