Crescent domain-wall pairs in anisotropic two-dimensional MnOI monolayer with fast dynamics

TL;DR

This paper reports the discovery of crescent-shaped domain-wall pairs in a 2D MnOI monolayer, exhibiting topological properties and fast current-driven dynamics, with potential applications in high-speed spintronics.

Contribution

It introduces a novel crescent-shaped topological domain-wall pair in a 2D magnetic material, demonstrating their controllable motion and potential for spintronic devices.

Findings

Antiferromagnetic crescent domain walls in MnOI monolayer exhibit topological features.

Both antiferromagnetic and ferromagnetic versions can be driven by current.

Fast, straight-line motion of domain walls suggests high-speed device applications.

Abstract

The controllable and efficient manipulation is always a key challenge for the application of topological magnetic textures in spintronic devices. By first-principles calculations and atomistic simulations, the present work reveals an exotic domain-wall pair in crescent shape, which possesses topology in one dimension and particle-like robustness in two dimensions. Its antiferromagnetic version is observed in the two-dimensional MnOI monolayer with a strong anisotropy, and the ferromagnetic version exists under an appropriate strain. Both of them can be driven efficiently by current to move in a straight line along a certain direction. Hereby, another possible path is provided to realize the application of topological magnetic texture in the next-generation high-speed spintronic devices.