Science · 2 July 2026 · From issue 00

Direct signatures of superconducting vortices splitting into fractional pieces that assemble into a new type of topological defect, a chiral skyrmion.

Yu Zheng, Quanxin Hu, Xin Yu, Haijiao Ji et al., Observation of quantum vortex core fractionalization and skyrmion formation in a superconductor, Science.

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