Topological spin Hall effect in antiferromagnetic skyrmions
Buhl PM, Freimuth F, Bluegel S, Mokrousov Y (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 11
Article Number: 1700007
Journal Issue: 4
Abstract
The topological Hall effect (THE), as one of the primary manifestations of non-trivial topology of chiral skyrmions, is traditionally used to detect the emergence of skyrmion lattices with locally ferromagnetic order. In this work we demonstrate that the appearance of non-trivial two-dimensional chiral textures with locally anti-ferromagnetic order can be detected through the spin version of the THE – the topological spin Hall effect (TSHE). Utilizing the semiclassical formalism, here used to combine chiral antiferromagnetic textures with a density functional theory description of the collinear, degenerate electronic structure, we follow the real-space real-time evolution of electronic SU(2) wavepackets in an external electric field to demonstrate the emergence of sizeable transverse pure spin current in synthetic antiferromagnets of the Fe/Cu/Fe trilayer type. We further unravel the extreme sensitivity of the TSHE to the details of the electronic structure, suggesting that the magnitude and sign of the TSHE in transition-metal synthetic antiferromagnets can be engineered by tuning such parameters as the thickness or band filling. Besides being an important step in our understanding of the topological properties of ever more complex skyrmionic systems, our results bear great potential in stimulating the discovery of antiferromagnetic skyrmions.
Involved external institutions
Germany (DE)How to cite
APA:
Buhl, P.M., Freimuth, F., Bluegel, S., & Mokrousov, Y. (2017). Topological spin Hall effect in antiferromagnetic skyrmions. Physica Status Solidi-Rapid Research Letters, 11(4). https://doi.org/10.1002/pssr.201700007
MLA:
Buhl, Patrick M., et al. "Topological spin Hall effect in antiferromagnetic skyrmions." Physica Status Solidi-Rapid Research Letters 11.4 (2017).
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