Design of 2D Skyrmionic Metamaterial Through Controlled Assembly
Qichen Xu Zhuanglin Shen Alexander Edström I. P. Miranda Zhiwei Lu Anders Bergman Danny Thonig Wanjian Yin Olle Eriksson Anna Delin
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 skyrmionics metamaterial
within a monolayer thin film and suggest several promising lattice-like,
flakes-like, and cell-like skyrmionic metamaterials that are surprisingly
stable. 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 (ASD) 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 forming reported intricate textures. In this work, two key
contributions are introduced to the field of skyrmionic systems. First, we
present a novel method for integrating control assembly protocols for the
stabilization and investigation of topological magnets, which marks a
significant advancement in the ability to explore new skyrmionic textures.
Second, we report on the discovery of skyrmionic metamaterials, which shows a
plethora of complex topologies that are possible to investigate theoretically
and experimentally.