Topological spin textures in a two-dimensional MnBi2(Se, Te)4 Janus material

Realizing and controlling topological spin textures are widely attractive for their promising applications in information and communication technology. Here, using first-principles calculations and micromagnetic simulations, a stable magnetic Janus material MnBi2(Se, Te)4 with an inherent Dzyaloshinskii–Moriya interaction is proposed to stabilize a variety of topological magnetic structures under temperature and magnetic fields. Furthermore, a sub-10 nm skyrmion can spontaneously form in the absence of magnetic fields in MnBi2(Se, Te)4 by using van der Waals heterostructure engineering. These results provide a promising route for the generation and modulation of topological spin textures in two-dimensional spintronic devices.