Advanced Research Institute of Multidisciplinary Science, and School of Materials Science and Engineering, Beijing Institute of Technology, 100081, Beijing, China.
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China.
Nat Commun. 2023 Jul 4;14(1):3941. doi: 10.1038/s41467-023-39668-y.
Solomon rings, upholding the symbol of wisdom with profound historical roots, were widely used as decorations in ancient architecture and clothing. However, it was only recently discovered that such topological structures can be formed by self-organization in biological/chemical molecules, liquid crystals, etc. Here, we report the observation of polar Solomon rings in a ferroelectric nanocrystal, which consist of two intertwined vortices and are mathematically equivalent to a [Formula: see text] link in topology. By combining piezoresponse force microscopy observations and phase-field simulations, we demonstrate the reversible switching between polar Solomon rings and vertex textures by an electric field. The two types of topological polar textures exhibit distinct absorption of terahertz infrared waves, which can be exploited in infrared displays with a nanoscale resolution. Our study establishes, both experimentally and computationally, the existence and electrical manipulation of polar Solomon rings, a new form of topological polar structures that may provide a simple way for fast, robust, and high-resolution optoelectronic devices.
所罗门环，以其深厚的历史根源象征着智慧，曾广泛应用于古代建筑和服饰的装饰。然而，最近才发现，这种拓扑结构可以通过生物/化学分子、液晶等的自组织形成。在这里，我们报告了在铁电纳米晶体中观察到的极所罗门环，它由两个相互缠绕的漩涡组成，在数学上等同于拓扑学中的[Formula: see text]链接。通过结合压电力显微镜观测和相场模拟，我们证明了通过电场可以实现极所罗门环和顶点纹理之间的可逆切换。这两种类型的拓扑极纹理表现出对太赫兹红外波的不同吸收，可以用于具有纳米级分辨率的红外显示器。我们的研究从实验和计算两方面证实了极所罗门环的存在和电操控，这是一种新的拓扑极结构形式，可能为快速、稳健、高分辨率的光电设备提供一种简单的方法。
