Wakayama Toshitaka, Aizawa Kohei, Higuchi Yudai, Higashiguchi Takeshi
Faculty of Health and Medical Care, Saitama Medical University, 1397-1 Yamane, Hidaka, Saitama, 350-1241, Japan.
Department of Electrical and Electronic Engineering, Faculty of Engineering, Utsunomiya University, 7-1-2 Yoto, Utsunomiya, Tochigi, 321-8585, Japan.
Sci Rep. 2024 Sep 17;14(1):21673. doi: 10.1038/s41598-024-71566-1.
Skyrmion structures play critical roles in solid-state systems involving electric, magnetic and optical fields. Previous approaches to the study of skyrmions have involved specific structures in magnetic materials, liquid crystals and polymers in addition to two-dimensional arrays used for electrical control. These methods have encountered limitations and constraints on both the microscopic and macroscopic scales related to the physical properties of materials. The present work demonstrates an origami-based skyrmion engineering strategy that suggests a new approach to topological control. This technique utilizes the unique properties of orientational origami, combining polarization techniques with rotationally symmetric, periodically folded designs. This strategy enables the transformation of flat sheets into three-dimensional structures with associated changes in optical topology, similar to the characteristics of proteins. Topological defects such as misalignments and dislocations in folded molecularly oriented sheets lead to the creation of skyrmion clusters at boundaries having different orientational orders. The strategy reported herein involves the construction of unique metamaterial platforms that could provide new applications for twistronics in graphene and photonic crystals.
斯格明子结构在涉及电场、磁场和光场的固态系统中起着关键作用。以往对斯格明子的研究方法除了用于电控制的二维阵列外，还涉及磁性材料、液晶和聚合物中的特定结构。这些方法在与材料物理性质相关的微观和宏观尺度上都遇到了限制和约束。目前的工作展示了一种基于折纸的斯格明子工程策略，该策略提出了一种拓扑控制的新方法。这项技术利用了定向折纸的独特性质，将偏振技术与旋转对称的周期性折叠设计相结合。这种策略能够将平板转变为具有光学拓扑相关变化的三维结构，类似于蛋白质的特征。折叠的分子取向片材中的拓扑缺陷，如排列不齐和位错，会导致在具有不同取向序的边界处形成斯格明子簇。本文报道的策略涉及构建独特的超材料平台，这可为石墨烯和光子晶体中的扭曲电子学提供新的应用。
