{
  "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"
    }
  }
}