{
"id": "2102.11246",
"version": "v1",
"published": "2021-02-22T18:31:13.000Z",
"updated": "2021-02-22T18:31:13.000Z",
"title": "Spirals and skyrmions in antiferromagnetic triangular lattices",
"authors": [
"Wuzhang Fang",
"Aldo Raeliarijaona",
"Po-Hao Chang",
"Alexey A. Kovalev",
"Kirill D. Belashchenko"
],
"comment": "11 pages, 10 figures",
"categories": [
"cond-mat.mes-hall",
"cond-mat.mtrl-sci"
],
"abstract": "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.",
"revisions": [
{
"version": "v1",
"updated": "2021-02-22T18:31:13.000Z"
}
],
"analyses": {
"keywords": [
"antiferromagnetic triangular lattices",
"feasible external magnetic field",
"skyrmion lattice",
"magnetic phase diagrams",
"dzyaloshinskii-moriya interaction parameters"
],
"note": {
"typesetting": "TeX",
"pages": 11,
"language": "en",
"license": "arXiv",
"status": "editable"
}
}
}