AI 中文总结
研究在零磁场下通过直流电流在FeGe纳米板中诱导形成和操纵嵌入式斯格明子袋，利用原位洛伦兹透射电子显微镜观察转变过程，经理论分析确定驱动机制，还展示不同Q值斯格明子袋间电诱导转变，为全电控制拓扑自旋纹理和缺陷奠定基础。
AI 中文摘要
磁斯格明子袋是承载多个具有可调拓扑电荷（Q）的斯格明子的涡旋状结构，对下一代自旋电子计算有重要前景。虽然已证明用磁场可产生它们，但直接电产生仍是挑战。本文报道在零磁场下，通过直流电流在FeGe纳米板中诱导形成和操纵嵌入式斯格明子袋。利用原位洛伦兹透射电子显微镜，捕捉到由纳秒电流脉冲驱动的扭曲螺旋基态向具有不同构型的嵌入式斯格明子袋的转变。理论分析表明该过程由自旋转移力矩诱导的螺旋态断裂驱动。此外，还展示了不同Q值的斯格明子袋之间的电诱导转变，为高Q拓扑自旋纹理和拓扑缺陷的全电控制奠定基础，为其在功能性自旋电子器件中的应用铺平道路。
英文摘要
Magnetic skyrmion bags-vortex-like structures hosting multiple skyrmions with tunable topological charge (Q)-hold significant promise for next-generation spintronic computing. However, while their creation using magnetic fields has been demonstrated, their direct electrical generation remains an outstanding challenge. Here, we report the direct current-induced formation and manipulation of embedded skyrmion bags in a FeGe nanoplate under zero magnetic field. Using in-situ Lorentz transmission electron microscopy, we capture the transformation of a distorted helical ground state into embedded skyrmion bags with diverse configurations, driven by nanosecond current pulses. Theoretical analysis indicates that this process is driven by the spin-transfer-torque-induced fracture of the helical state. Furthermore, we demonstrate electrically-induced transitions between skyrmion bags of different Q, leading to the stabilization of complex three-dimensional topological structures, including experimental signatures of magnetic monopoles and bobbers. Our work establishes a foundation for all-electrical control of high-Q topological spin textures and topological defects, paving the way for their application in functional spintronic devices.
Journal refNature Communications 2026
DOI：10.1038/s41467-026-74046-4
