SKM 2021 – scientific programme
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MA: Fachverband Magnetismus
MA 1: Surface Magnetism (joint session MA/O)
MA 1.9: Talk
Monday, September 27, 2021, 12:15–12:30, H5
The chiral Hall effect in canted ferromagnets and antiferromagnets — •Jonathan Kipp1, Kartik Samanta1, Fabian Lux1,2,3, Maximilian Merte1,2,3, Dongwook Go1,3, Jan-Philip Hanke1, Matthias Redies1,2, Frank Freimuth1,3, Stefan Blügel1, Marjana Lezaic1, and Yuriy Mokrousov1,3 — 1Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum — 2RWTH Aachen University, Aachen, Germany — 3Institute of Physics, Johannes Gutenberg-University Mainz
There are numerous exciting classes of antiferromagnets, where the anomalous and recently discovered crystal Hall [1] effect as well as the topological Hall effect in non-coplanar antiferromagnets [2] have been studied in the past decades. In this work, we uncover a novel type of Hall effect emerging in generic canted spin systems. Identifying a clear fingerprint of this chiral Hall effect (CHE) in discrete tight-binding models as well as ab-initio calculations is central in establishing a solid understanding of this new phenomenon closely tied to real space topology of magnetic textures. We provide robust numerical evidence for the CHE in a honeycomb lattice of canted spins and present a material candidate, SrRuO3. We uncover contributions to the Hall conductivity sensitive to the canting angle between neighboring spins which can be directly related to the imprinted vector chirality. Exploring the symmetry properties of the CHE we demonstrate the complex interplay of symmetry, topology and chirality in canted spin systems. [1]L .Smejkal et al., Science Advances 6 (2020) [2]L. Smejkal et al., Nature Physics 14, 242-251 (2018) [3]J. Kipp et al., Comm. Phys. 4, 99 (2021)