Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 3: Focus Session: Novel 3D magnetic spin textures

MA 3.3: Vortrag

Montag, 1. April 2019, 10:30–10:45, H38

Interplay of chirality and spin-orbit coupling in the anomalous Hall effect of non-collinear magnets — •Fabian R. Lux¹, Matthias Redies¹, Frank Freimuth¹, Stefan Blügel¹, and Yuriy Mokrousov^1,2 — ¹Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany — ²Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

We discuss the emergence of a novel anomalous Hall effect, which is driven by the interplay of spin-orbit coupling and the presence of a non-collinear magnetic structure. The predicted effect is linear in the real-space gradients of the underlying magnetic texture and therefore chiral in nature. Within a semiclassical language, therefore, its origin is neither the emergent field which is responsible for the topological Hall effect, nor is it the pure momentum-space Berry curvature. Rather, it is the same effective magnetic field that is responsible for the emergence of a chiral contribution to the orbital magnetization [1]. This direction opens up new perspectives for the all-electrical detection of non-collinear magnetic structures such as skyrmions, hopfions and chiral bobbers [2].

[1] F. R. Lux et al., Communications Physics 1, 60 (2018)
[2] M. Redies et al., arXiv:1811.01584 (2018)