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arXiv · 2304.00671

Bloch-type magnetic skyrmions in two-dimensional lattice

Wenhui Du·Kaiying Dou·Ying Dai·Baibiao Huang·Yandong Ma
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Abstract

Magnetic skyrmions in two-dimensional lattice are a prominent topic of condensed matter physics and material science. Current research efforts in this field are exclusively constrained to Neel-type and antiskyrmion, while Bloch-type magnetic skyrmions are rarely explored. Here, we report the discovery of Bloch-type magnetic skyrmions in two-dimensional lattice of MnInP2Te6, using firstprinciples calculations and Monte-Carlo simulations. Arising from the joint effect of broken inversion symmetry and strong spin-orbit coupling, monolayer MnInP2Te6 presents large Dzyaloshinskii-Moriya interaction. This, along with ferromagnetic exchange interaction and out-ofplane magnetic anisotropy, gives rise to skyrmion physics in monolayer MnInP2Te6, without needing magnetic field. Remarkably, different from all previous works on two-dimensional lattice,the resultant magnetic skyrmions feature Bloch-type, which is protected by D3 symmetry.Furthermore, the Bloch-type magnetic bimerons are also identified in monolayer MnTlP2Te6. The phase diagrams of these Bloch-type topological magnetisms under magnetic field, temperature and strain are mapped out. Our results greatly enrich the research on magnetic skyrmions in twodimensional lattice.

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Wenhui Du, Kaiying Dou, Ying Dai, Baibiao Huang, Yandong Ma. 2023-04-03. Bloch-type magnetic skyrmions in two-dimensional lattice. https://arxiv.org/abs/2304.00671

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