Emergent and topological properties of 3D chiral gyroid nanostructures

本研究的目的是探讨三维纳米网络中形貌对磁性和自旋输运的影响。我们澄清了Ni陀螺，由手征3-连接节点，表现为非共线，非伊辛巨自旋与高度取向相关的磁阻阻挫网络。我们成功地证明，镍陀螺表现出强烈的各向异性自旋波输运和潜在的本地化的自旋波。使用X射线纳米断层扫描，我们成功地在3D样品中成像，这些样品是通过陀螺和非手性的4连接单金刚石网络的自组装制造的，量化了自组装过程中网络的变形，并首次揭示了扩展的液晶样拓扑缺陷。这些结果有望导致新的方法来设计和控制集体和拓扑效应，通过磁网络的自旋电子学和非常规计算应用的形态控制。

This study aims to investigate the influence of morphology on magnetism and spin transport in 3D nanoscale networks. We clarified that Ni gyroids, composed of chiral 3-connected nodes, behave as frustrated networks of non-collinear, non-Ising macrospins with highly orientation-dependent magnetoresistance. We successfully demonstrated that Ni gyroids exhibit both strongly anisotropic spin-wave transport and potential localisation of spin waves. Using X-ray nanotomography, we succeeded in imaging in 3D samples fabricated by self-assembly of both gyroids and achiral, 4-connected single-diamond networks, quantifying the distortion of the network during self-assembly and for the first time revealing extended liquid-crystal-like topological defects. These results are expected to lead to new ways to design and control collective and topological effects via morphology control in magnetic networks for spintronics and unconventional computing applications.