Regensburg 2025 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 31: Poster II

MA 31.18: Poster

Mittwoch, 19. März 2025, 17:00–19:30, P1

Influence of defects on the ultrafast orbital Hall effect in metallic nanoribbons — •Theresa Albrecht, Franziska Ziolkowski, Oliver Busch, Börge Göbel, Ingrid Mertig, and Jürgen Henk — Institut für Physik, Martin-Luther-Universität, D-06099 Halle

The time-dependent orbital Hall effect, which is generated by a femtosecond laser pulse, called the ultrafast orbital Hall effect (UOHE) is investigated. We present the influence of different types of defects on the UOHE in a Cu nanoribbon. The laser-driven electron dynamics is numerically calculated by our theoretical framework Evolve based on a real-space tight-binding approach for finite systems and the solution of the von Neumann equation for the calculation of the occupation numbers [1]. As a result we discuss charge redistribution and charge currents as well as orbital angular momenta and their currents with atomic resolution in the time domain. The role of defects is analysed quantitatively which is particularly important to compare with experiments.

[1] O. Busch et al., Physical Review Research 6, 013208 (2024)

Keywords: Orbital Hall effect; Ultrafast electron dynamics; Laser excitation