通过受控装配设计二维天磁超材料

IF 9.4 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Qichen Xu, Zhuanglin Shen, Alexander Edström, I. P. Miranda, Zhiwei Lu, Anders Bergman, Danny Thonig, Wanjian Yin, Olle Eriksson, Anna Delin
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引用次数: 0

摘要

尽管对磁性skyrmions和反skyrmions进行了广泛的研究,但在制作具有不同甚至量身定制拓扑结构的非平凡高阶skyrmions纹理方面仍然存在重大挑战。为了解决这一挑战,我们将重点放在单层薄膜内的超粒子材料的构建途径上,并提出了几种超粒子材料,由于其自稳定机制,这些超粒子材料非常稳定,即寿命长。这使得这些新的纹理在应用中很有前景。我们方法的核心是“模拟控制组装”的概念,简而言之,这是一种受“点击化学”启发的协议,它允许在人们喜欢的地方定位拓扑磁性结构,然后允许能量最小化来阐明稳定性。利用高通量原子自旋动态模拟和最先进的人工智能驱动工具,我们分离出了skyrmions(拓扑电荷Q = 1)、antiskyrmions (Q =−1)和skyrmionium (Q = 0)。这些实体作为基础的“skyrmionic构建块”,形成了这里报道的复杂纹理。在这项工作中,两个关键的贡献被介绍到天空系统领域。首先,我们提出了一种新的原子自旋动力学模拟和控制装配协议的组合,用于稳定和研究新的拓扑磁体。其次,使用上述方法,我们报告了天空粒子超材料的发现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Design of 2D skyrmionic metamaterials through controlled assembly

Design of 2D skyrmionic metamaterials through controlled assembly

Despite extensive research on magnetic skyrmions and antiskyrmions, a significant challenge remains in crafting nontrivial high-order skyrmionic textures with varying, or even tailor-made, topologies. We address this challenge, by focusing on a construction pathway of skyrmionic metamaterials within a monolayer thin film and suggest several skyrmionic metamaterials that are surprisingly stable, i.e., long-lived, due to a self-stabilization mechanism. This makes these new textures promising for applications. Central to our approach is the concept of ’simulated controlled assembly’, in short, a protocol inspired by ’click chemistry’ that allows for positioning topological magnetic structures where one likes, and then allowing for energy minimization to elucidate the stability. Utilizing high-throughput atomistic-spin-dynamic simulations alongside state-of-the-art AI-driven tools, we have isolated skyrmions (topological charge Q = 1), antiskyrmions (Q = − 1), and skyrmionium (Q = 0). These entities serve as foundational ’skyrmionic building blocks’ to form the here-reported intricate textures. In this work, two key contributions are introduced to the field of skyrmionic systems. First, we present a novel combination of atomistic spin dynamics simulations and controlled assembly protocols for the stabilization and investigation of new topological magnets. Second, using the aforementioned methods we report on the discovery of skyrmionic metamaterials.

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来源期刊
npj Computational Materials
npj Computational Materials Mathematics-Modeling and Simulation
CiteScore
15.30
自引率
5.20%
发文量
229
审稿时长
6 weeks
期刊介绍: npj Computational Materials is a high-quality open access journal from Nature Research that publishes research papers applying computational approaches for the design of new materials and enhancing our understanding of existing ones. The journal also welcomes papers on new computational techniques and the refinement of current approaches that support these aims, as well as experimental papers that complement computational findings. Some key features of npj Computational Materials include a 2-year impact factor of 12.241 (2021), article downloads of 1,138,590 (2021), and a fast turnaround time of 11 days from submission to the first editorial decision. The journal is indexed in various databases and services, including Chemical Abstracts Service (ACS), Astrophysics Data System (ADS), Current Contents/Physical, Chemical and Earth Sciences, Journal Citation Reports/Science Edition, SCOPUS, EI Compendex, INSPEC, Google Scholar, SCImago, DOAJ, CNKI, and Science Citation Index Expanded (SCIE), among others.
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