Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 63: Spin: Transport, Orbitronics and Hall Effects III
MA 63.1: Talk
Friday, March 20, 2020, 09:30–09:45, HSZ 403
Spin and anomalous Hall effect induced charge and spin currents in ferromagnetic/nonmagnetic heterostructures — •Albert Hönemann1, Christian Herschbach1, Dmitry V. Fedorov2, Martin Gradhand3, and Ingrid Mertig1,4 — 1Martin Luther University Halle-Wittenberg, Halle, Germany — 2University of Luxembourg, Luxembourg, Luxembourg — 3University of Bristol, Bristol, United Kingdom — 4Max Planck Institute of Microstructure Physics, Halle, Germany
Transport phenomena caused by spin-orbit coupling such as spin Hall effect (SHE) and anomalous Hall effect (AHE) are highly relevant topics of current research. In ferromagnetic/nonmagnetic heterostructures, the interplay of spin-orbit and exchange interaction causes new phenomena like spin-orbit torques [1].
We use an ab initio approach based on a relativistic Korringa-Kohn-Rostoker method to determine the electronic structure [2] and solve the linearized Boltzmann equation to describe the electronic transport [3]. We apply these methods to a Co/Cu superlattice with different substitutional impurities delta-distributed within the individual atomic layers [4]. We investigate the AHE-induced charge current as well as the SHE-induced spin current perpendicular and parallel to the interface and report on the spatial distribution of charge and spin current with respect to the interface.
[1] Gambardella et al., Phil. Trans. R. Soc. A 369, 3175 (2011); [2] Gradhand et al., PRB 80, 224413 (2009); [3] Gradhand et al., PRL 104, 186403 (2010); [4] Hönemann et al., PRB 99, 024420 (2019);