Spontaneous skyrmionic lattice from anisotropic symmetric exchange in a Ni-halide monolayer.
Spontaneous skyrmionic lattice from anisotropic symmetric exchange in a Ni-halide monolayer.
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DOI:
10.1038/s41467-020-19535-w
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发表时间:
2020-11-13
影响因子:
16.6
通讯作者:
Picozzi S
中科院分区:
文献类型:
--
作者:
Amoroso D;Barone P;Picozzi S
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. Skyrmions, topological spin textures, are typically stabilized by the Dzyaloshinskii-Moriya interaction and an applied magnetic field. In this theoretical study, by analysing monolayer NiI2, the authors suggest that two-site anisotropy with magnetic frustration can stabilize a skyrmion lattice.
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影响因子:
16.6
作者:
Hoffmann M;Zimmermann B;Müller GP;Schürhoff D;Kiselev NS;Melcher C;Blügel S
通讯作者:
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影响因子:
3.7
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影响因子:
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通讯作者:
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