arXiv Analytics

Sign in

arXiv:2102.11246 [cond-mat.mes-hall]AbstractReferencesReviewsResources

Spirals and skyrmions in antiferromagnetic triangular lattices

Wuzhang Fang, Aldo Raeliarijaona, Po-Hao Chang, Alexey A. Kovalev, Kirill D. Belashchenko

Published 2021-02-22Version 1

We study realizations of spirals and skyrmions in two-dimensional antiferromagnets with a triangular lattice on an inversion-symmetry-breaking substrate. As a possible material realization, we investigate the adsorption of transition-metal atoms (Cr, Mn, Fe, or Co) on a monolayer of MoS$_2$, WS$_2$, or WSe$_2$ and obtain the exchange, anisotropy, and Dzyaloshinskii-Moriya interaction parameters using first-principles calculations. Using energy minimization and parallel-tempering Monte-Carlo simulations, we determine the magnetic phase diagrams for a wide range of interaction parameters. We find that skyrmion lattices can appear even with weak Dzyaloshinskii-Moriya interactions, but their stability is hindered by magnetic anisotropy. However, a weak easy plane magnetic anisotropy can be beneficial for stabilizing the skyrmion phase. Our results suggest that Cr$/$MoS$_2$, Fe$/$MoS$_2$, and Fe$/$WSe$_2$ interfaces can host spin spirals formed from the 120$^{\circ}$ antiferromagnetic states. Our results further suggests that for other interfaces, such as Fe$/$MoS$_2$, the Dzyaloshinskii-Moriya interaction is strong enough to drive the system into a three-sublattice skyrmion lattice in the presence of experimentally feasible external magnetic field.

Related articles: Most relevant | Search more
arXiv:1010.2258 [cond-mat.mes-hall] (Published 2010-10-11)
Magnetic phase diagrams of barcode-type nanostructures
arXiv:1608.04840 [cond-mat.mes-hall] (Published 2016-08-17)
Emergent elasticity of skyrmion lattice in chiral magnets
arXiv:1509.00591 [cond-mat.mes-hall] (Published 2015-09-02)
Topological dynamics and current-induced motion in a skyrmion lattice