SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 1: Surface Magnetism (joint session MA/O)

MA 1.9: Vortrag

Montag, 27. September 2021, 12:15–12:30, H5

The chiral Hall effect in canted ferromagnets and antiferromagnets — •Jonathan Kipp¹, Kartik Samanta¹, Fabian Lux^1,2,3, Maximilian Merte^1,2,3, Dongwook Go^1,3, Jan-Philip Hanke¹, Matthias Redies^1,2, Frank Freimuth^1,3, Stefan Blügel¹, Marjana Lezaic¹, and Yuriy Mokrousov^1,3 — 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)