Creating and Deleting a Single Dipolar Skyrmion by Surface Spin Twists

Jin Tang; Jialiang Jiang; Yaodong Wu; Lingyao Kong; Yihao Wang; Junbo Li; Y. Soh; Yimin Xiong; Shouguo Wang; Mingliang Tian; Haifeng Du

doi:10.1021/acs.nanolett.4c04606

arXiv · 2512.09229

Creating and Deleting a Single Dipolar Skyrmion by Surface Spin Twists

Jin Tang·Jialiang Jiang·Yaodong Wu·Lingyao Kong·Yihao Wang·Junbo Li·Y. Soh·Yimin Xiong·Shouguo Wang·Mingliang Tian·Haifeng Du

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Abstract

We report deterministic operations on single dipolar skyrmions confined in nanostructured cuboids using in-plane currents. We achieve highly reversible writing and deleting of skyrmions in the simple cuboid without any artificial defects or pinning sites. The current-induced creation of skyrmions is well-understood through the spin-transfer torque acting on surface spin twists of the spontaneous 3D ferromagnetic state, caused by the magnetic dipole-dipole interaction of the uniaxial Fe3Sn2 magnet with a low-quality factor. Current-induced deletions of skyrmions result from the combined effects of magnetic hysteresis and Joule thermal heating. Our results are replicated consistently through 3D micromagnetic simulations. Our approach offers a viable method for achieving reliable single-bit operations in skyrmionic devices for applications such as random-access memories.

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BibTeX RIS

Jin Tang, Jialiang Jiang, Yaodong Wu, Lingyao Kong, Yihao Wang, Junbo Li, Y. Soh, Yimin Xiong, Shouguo Wang, Mingliang Tian, Haifeng Du. 2025-12-10. Creating and Deleting a Single Dipolar Skyrmion by Surface Spin Twists. https://doi.org/10.1021/acs.nanolett.4c04606

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