Article (Scientific journals)
Spontaneous skyrmionic lattice from anisotropic symmetric exchange in a Ni-halide monolayer
Amoroso, Danila; Barone, Paolo; Picozzi, Silvia
2020In Nature Communications, 11 (1), p. 5784
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Abstract :
[en] 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 interaction that is responsible for the predicted topological spin structures. The proposed mechanism finds a prototypical manifestation in two-dimensional magnets, thus broadening the class of materials that can host spontaneous skyrmionic states.
Disciplines :
Physics
Author, co-author :
Amoroso, Danila ;  Consiglio Nazionale delle Ricerche > CNR-SPIN
Barone, Paolo
Picozzi, Silvia
Language :
English
Title :
Spontaneous skyrmionic lattice from anisotropic symmetric exchange in a Ni-halide monolayer
Publication date :
2020
Journal title :
Nature Communications
eISSN :
2041-1723
Publisher :
Nature Publishing Group, United Kingdom
Volume :
11
Issue :
1
Pages :
5784
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 24 December 2021

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