Anisotropic Dzyaloshinskii-Moriya interaction protected by D2d crystal symmetry in two-dimensional ternary compounds

Magnetic skyrmions, topologically protected chiral spin swirling quasiparticles, have attracted great attention in fundamental physics and applications. Recently, the discovery of two-dimensional (2D) van der Waals (vdW) magnets have aroused great interest due to their appealing physical properties....

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Bibliographic Details
Published in:npj computational materials 2022-06, Vol.8 (1), Article 128
Main Authors: Ga, Yonglong, Cui, Qirui, Zhu, Yingmei, Yu, Dongxing, Wang, Liming, Liang, Jinghua, Yang, Hongxin
Format: Article
Language:English
Subjects:
639/766/119/1001
639/766/119/997
Anisotropy
Antiferromagnetism
Characterization and Evaluation of Materials
Chemistry and Materials Science
Computational Intelligence
Crystal structure
Crystals
Elementary excitations
Ferromagnetism
First principles
Heterostructures
Hypothetical particles
Magnetic properties
Magnets
Materials Science
Mathematical and Computational Engineering
Mathematical and Computational Physics
Mathematical Modeling and Industrial Mathematics
Particle theory
Physical properties
Swirling
Symmetry
Theoretical
Thin films
Transition metals
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Summary:Magnetic skyrmions, topologically protected chiral spin swirling quasiparticles, have attracted great attention in fundamental physics and applications. Recently, the discovery of two-dimensional (2D) van der Waals (vdW) magnets have aroused great interest due to their appealing physical properties. Moreover, both experimental and theoretical works have revealed that isotropic Dzyaloshinskii–Moriya interaction (DMI) can be achieved in 2D magnets or ferromagnet-based heterostructures. However, 2D magnets with anisotropic DMI haven’t been reported yet. Here, via using first-principles calculations, we unveil that anisotropic DMI protected by D 2d crystal symmetry can exist in 2D ternary compounds M Cu X 2 ( M : 3d transition metal (TM), X : group VIA). Interestingly, by using micromagnetic simulations, we demonstrate that ferromagnetic (FM) antiskyrmions, FM bimerons, antiferromagnetic (AFM) antiskyrmions, and AFM bimerons can be realized in the M Cu X 2 family. Our discovery opens up an avenue to creating antiskyrmions and bimerons with anisotropic DMI protected by D 2d crystal symmetry in 2D magnets.
ISSN:2057-3960
2057-3960
DOI:10.1038/s41524-022-00809-4