Spontaneous skyrmionic lattice from anisotropic symmetric exchange in a Ni-halide monolayer.

ABSTRACT: Topological spin structures, such as magnetic skyrmions, hold great promises for data storage applications, thanks to their inherent stability. In most cases, skyrmions are stabilized by magnetic fields in non-centrosymmetric systems displaying the chiral Dzyaloshinskii-Moriya exchange interaction, while spontaneous skyrmion lattices have been reported in centrosymmetric itinerant magnets with long-range interactions. Here, a spontaneous anti-biskyrmion lattice with unique topology and chirality is predicted in the monolayer of a semiconducting and centrosymmetric metal halide, NiI₂. Our first-principles and Monte Carlo simulations reveal that the anisotropies of the short-range symmetric exchange, when combined with magnetic frustration, can lead to an emergent chiral interacti

SUBMITTER: Amoroso D 

PROVIDER: S-EPMC7666143 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature