Magnetic skyrmion braids
Fengshan Zheng, Filipp N. Rybakov, Nikolai S. Kiselev, Dongsheng Song,, Andr\'as Kov\'acs, Haifeng Du, Stefan Bl\"ugel, Rafal E. Dunin-Borkowski

TL;DR
This paper reports the discovery of braided superstructures of magnetic skyrmions in FeGe crystals, revealing complex topological textures that could enable new magnetic applications.
Contribution
It provides the first experimental observation of magnetic skyrmion braids using electron microscopy and numerical analysis.
Findings
Revealed braided skyrmion structures in FeGe crystals
Demonstrated the existence of complex topological magnetic textures
Opened pathways for topological magnetic applications
Abstract
Filamentary textures can take the form of braided, rope-like superstructures in nonlinear media such as plasmas and superfluids. The formation of similar superstructures in solids has been predicted, for example from flux lines in superconductors. However, their observation has proved challenging. Here, we use electron microscopy and numerical methods to reveal braided superstructures of magnetic skyrmions in thin crystals of B20-type FeGe. Their discovery opens the door to applications of rich topological landscapes of geometric braids in magnetic solids.
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