Magnetic skyrmion braids

Fengshan Zheng (), Filipp N. Rybakov (), Nikolai S. Kiselev (), Dongsheng Song, András Kovács, Haifeng Du, Stefan Blügel and Rafal E. Dunin-Borkowski
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Fengshan Zheng: Forschungszentrum Jülich
Filipp N. Rybakov: KTH-Royal Institute of Technology
Nikolai S. Kiselev: Forschungszentrum Jülich and JARA
Dongsheng Song: Forschungszentrum Jülich
András Kovács: Forschungszentrum Jülich
Haifeng Du: Chinese Academy of Science (CAS)
Stefan Blügel: Forschungszentrum Jülich and JARA
Rafal E. Dunin-Borkowski: Forschungszentrum Jülich

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Skyrmions are vortex-like spin textures that form strings in magnetic crystals. Due to the analogy to elastic strings, skyrmion strings are naturally expected to braid and form complex three-dimensional patterns, but this phenomenon has not been explored yet. We found that skyrmion strings can form braids in cubic crystals of chiral magnets. This finding is confirmed by direct observations of skyrmion braids in B20-type FeGe using transmission electron microscopy. The theoretical analysis predicts that the discovered phenomenon is general for a wide family of chiral magnets. These findings have important implications for skyrmionics and propose a solid-state framework for applications of the mathematical theory of braids.

Date: 2021
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DOI: 10.1038/s41467-021-25389-7

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