Room-Temperature Generation and Electric-Current-Driven Manipulation of Isolated Fractional Antiskyrmions in a Chiral Magnet.

Authors

Zhidong He, Zhan Wang, Yunxiang Yang, Yunchi Zhao, Jun Shen, Tongyun Zhao, Ying Zhang, Bao-Gen Shen

Published in

Physical review letters. Volume 137. Issue 12. Pages 126704. Sep 18, 2026.

Abstract

Topologically protected (anti)skyrmions are promising information carriers for next-generation spintronics. Their fractional counterparts, however, have so far been observed only in bound pairs or lattice states, leaving a major challenge for the stabilization and electrical manipulation of an isolated fractional topological spin texture. Here, we report the generation of an isolated meron with half topological charge (Q=1/2) and its electric-current-driven linear motion at room temperature in the chiral magnet Mn_{1.4}PtSn. Both Lorentz transmission electron microscopy and micromagnetic simulations provide evidence for the emergence of a unique fractional topological state due to the edge-induced topological transformation, distinct from bulk excitations. Importantly, the sample edge simultaneously acts as a one-dimensional track that enables robust current-driven linear motion by compensating the transverse Magnus force, thereby completely suppressing the intrinsic skyrmion Hall effect. These results establish an experimental pathway for generating and manipulating isolated fractional topological spin textures in real space, thereby offering a platform to explore fractional topological physics and spintronic functionalities.

PMID:
42826938
Bibliographic data and abstract were imported from PubMed on 03 Oct 2026.

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