发表机构
Oak Ridge National Laboratory; Institute for Quantum Computing, University of Waterloo; Department of Physics & Astronomy, University of Waterloo; School of Physics, The University of New South Wales; National Institute of Standards and Technology; Department of Chemistry, University of Waterloo; Department of Physics, University at Buffalo, State University of New York; Laboratory for Neutron Scattering and Imaging, PSI Center for Neutron and Muon Sciences（橡树岭国家实验室; 滑铁卢大学量子计算研究所; 滑铁卢大学物理与天文系; 新南威尔士大学物理学院; 美国国家标准与技术研究院; 滑铁卢大学化学系; 纽约州立大学布法罗分校物理系; 瑞士保罗谢勒研究所中子与缪子科学中心中子散射与成像实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文首次通过中子散射层析成像实验可视化三维拓扑Q=0斯格明子结构，发现涡旋-反涡旋晶格与merons-磁单极耦合介导拓扑转变，为高维自旋电子学多比特编码和单向输运奠定基础。
AI 中文摘要
磁性斯格明子代表涡旋状的自旋构型，为下一代自旋电子学技术提供了稳健的平台。尽管它们常被视为具有整数拓扑电荷的二维物体，但其向三维弦的延伸实现了其他复合结构，这些结构具有超越平面框架的独特器件功能。不幸的是，缺乏体相探测手段未能实现此类更高维拓扑结构及其应用。在此，我们报告了利用中子散射层析成像技术，在Co$_8$Zn$_8$Mn$_4$样品的平衡相中首次实验可视化三维拓扑$Q = 0$斯格明子结构。无序斯格明子态揭示了亚稳态斯格明子泡和体相系统中新颖的复合拓扑物体。涡旋-反涡旋晶格介导拓扑变化，通过merons和磁单极的耦合实现了前所未有的转变路径。目前对体相Q = 0准粒子和meron介导动力学的实现，为通过多比特编码架构、单向输运方案和磁单极介导控制实现更高维自旋电子学框架铺平了道路。
英文摘要
Magnetic skyrmions represent vortex-like spin configurations that provide a robust platform for next-generation spintronic technologies. Although they are often treated as two-dimensional objects with integer topological charge, their extension into three-dimensional strings realizes other composite structures with unique device functionalities that transcend planar frameworks. Unfortunately, a lack of bulk probes has failed to realize such higher-dimensional topological structures and their implementations. Here, we report the first experimental visualization of three-dimensional topological $Q = 0$ skyrmion structures using neutron scattering tomography techniques across the equilibrium phase of a Co$_8$Zn$_8$Mn$_4$ sample. Disordered skyrmion states reveal metastable skyrmioniums and composite topological objects novel to bulk systems. Vortex-antivortex lattices mediate changes in topology, with unprecedented transition pathways via a coupling of merons and monopoles. The present realization of bulk Q = 0 quasiparticles and meron-mediated dynamics paves the way for higher-dimensional spintronic frameworks through multi-bit encoding architectures, unidirectional transport schemes, and monopole-mediated controls.
Comments9 pages, 5 figures, 1 table
