Mixed topology ring states for Hall effect and orbital magnetism in skyrmions of Weyl semimetals
Redies M, Lux FR, Hanke JP, Buhl PM, Bluegel S, Mokrousov Y (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 102
Article Number: 184407
Journal Issue: 18
DOI: 10.1103/PhysRevB.102.184407
Abstract
As skyrmion lattices are attracting increasing attention owing to their properties driven by real-space topology, properties of magnetic Weyl semimetals with complex k-space topology are moving into the focus of research. We consider Hall transport properties and orbital magnetism of skyrmion lattices imprinted in topological semimetals by employing a minimal model of a mixed Weyl semimetal which, as a function of the magnetization direction, exhibits two Chern insulator phases separated by a Weyl state. We find that while the orbital magnetization is topologically robust and Hall transport properties exhibit a behavior consistent with that expected for the recently discovered chiral Hall effect [F. R. Lux, Phys. Rev. Lett. 124, 096602 (2020)PRLTAO0031-900710.1103/PhysRevLett.124.096602], their evolution in the region of the Chern insulator gap is largely determined by the properties of the so-called mixed topology ring states, emerging in domain walls that separate the skyrmion core from the ferromagnetic background. In particular, we show that these localized ring states possess a robust orbital chirality which reverses sign as a function of the skyrmion radius, thereby mediating a smooth switching dynamics of the orbital magnetization. We speculate that while the emergent ring states can possibly play a role in the physics of Majorana states, probing their properties experimentally can provide insights into the details of skyrmionic spin structures.
Involved external institutions
Forschungszentrum Jülich / Research Centre Jülich (FZJ)
Germany (DE)
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
Germany (DE)
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
How to cite
APA:
Redies, M., Lux, F.R., Hanke, J.-P., Buhl, P.M., Bluegel, S., & Mokrousov, Y. (2020). Mixed topology ring states for Hall effect and orbital magnetism in skyrmions of Weyl semimetals. Physical Review B, 102(18). https://doi.org/10.1103/PhysRevB.102.184407
MLA:
Redies, Matthias, et al. "Mixed topology ring states for Hall effect and orbital magnetism in skyrmions of Weyl semimetals." Physical Review B 102.18 (2020).
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