SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 2: Skyrmions I
MA 2.4: Vortrag
Montag, 27. März 2023, 10:30–10:45, HSZ 02
Topological Hall effect in Pd/Fe/Ir(111) induced by electron scattering on magnetic skyrmions — •Adamantia Kosma1, Philipp Rüßmann2,3, Stefan Blügel3, and Phivos Mavropoulos1 — 1Department of Physics, National and Kapodistrian University of Athens, Panepistimioupolis 15784, Athens, Greece — 2Institute for Theoretical Physics and Astrophysics, University of Würzburg, 97074 Würzburg, Germany — 3Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
This work comprises an ab-initio computational study of the topological Hall effect (THE) arising from magnetic skyrmions [1], which are formed in ultrathin films Pd/Fe/Ir(111) [2]. The investigation of the THE in these systems is of great importance, as it provides a way of electrically detecting magnetic skyrmions. We analyse the resistivity and the Hall angle of the system, which are calculated employing the non-collinear spin-density-functional theory within the full-potential relativistic Korringa-Kohn-Rostoker (KKR) Green function method combined with the semiclassical Boltzmann transport equation [3,4]. We discuss the dependence of the THE on additional electron scattering, modelled as random disorder broadening. Our findings predict a strong dependence of the topological Hall angle on the degree of disorder of a sample. [1] D. Maccariello et al., Nature Nanotechnology, vol. 13, 233-237 (2018). [2] N. Romming et al., Science, vol. 341, 6146, 2013. [3] https://jukkr.fz-juelich.de/. [4] A. Kosma et al., Phys. Rev. B, vol. 102, 144424.