Elliptical spin textures in two-dimensional semimetals with spatially anisotropic Dzyaloshinskii-Moriya interaction

Elliptical skyrmions within epitaxial bulk materials have been intensively studied due to their intriguing dynamics behaviors. In two-dimensional materials, however, elliptical spin textures are rarely explored. In this paper, we investigate various properties of ${\text{V}X}_{2}$ via first-principles calculations and Monte Carlo simulations. At zero external field, the $\text{sub}\text{\ensuremath{-}}10\phantom{\rule{0.222222em}{0ex}}\mathrm{nm}$ circular antiskyrmions are obtained in the monolayer ${\mathrm{VTe}}_{2}$. Interestingly, these antiskyrmions can be transformed into bimerons and elliptical antiskyrmions under biaxial and uniaxial strains. More importantly, even without strains and external fields, the intrinsic elliptical antiskyrmions and bimerons are discovered in monolayer $\text{V}XY$ ($X,Y=$ S, Se, Te), which present rather high Curie temperatures. These spin textures exhibit stability over a wide temperature range. Our results provide a very feasible approach to realizing elliptical spin textures in two-dimensional materials.