Paradoxical Topological Soliton Lattice in Anisotropic Frustrated Chiral Magnets

Abstract 2D chiral magnets are known to host a variety of skyrmions, characterized by an integer topological charge (). However, these systems typically favor uniform lattices as thermodynamically stable phases composed of either skyrmions ( Q = −1) or antiskyrmions ( Q = 1). In isotropic chiral magnets, skyrmion‐antiskyrmion coexistence is typically transient due to mutual annihilation, making the observation of a stable, long‐range, ordered lattice a significant challenge. Here, this challenge is addressed by demonstrating a skyrmion‐antiskyrmion lattice as a magnetic field‐induced topological ground state in chiral magnets with competing anisotropic interactions, specifically Dzyaloshinskii‐Moriya and frustrated exchange interactions. This unique lattice exhibits a net‐zero global topological charge due to the balanced populations of skyrmions and antiskyrmions. Furthermore, density functional theory and spin‐lattice simulations identify 2Fe/InSb(110) as an ideal candidate material for realizing this phase. This finding reveals new possibilities for manipulating magnetic solitons and establishes anisotropic frustrated chiral magnets as a promising material class for future spintronic applications.