Liu Minghao, Wan Tsz Lok, Dou Kaiying, Zhang Lei, Sun Wei, Jiang Jiawei, Ma Yandong, Gu Yuantong, Kou Liangzhi
School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, QLD 4001, Australia.
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Shandanan Str. 27, Jinan 250100, P. R. China.
Phys Chem Chem Phys. 2024 Feb 14;26(7):6189-6195. doi: 10.1039/d3cp05096c.
Magnetic skyrmions and their effective manipulations are promising for the design of next-generation information storage and processing devices, due to their topologically protected chiral spin textures and low energy cost. They, therefore, have attracted significant interest from the communities of condensed matter physics and materials science. Herein, based on density functional theory (DFT) calculations and micromagnetic simulations, we report the spontaneous 2 nm-diameter magnetic skyrmions in the monolayer CuCrPTe originating from the synergistic effect of broken inversion symmetry and strong Dzyaloshinskii-Moriya interactions (DMIs). The creation and annihilation of magnetic skyrmions can be achieved the ferroelectric to anti-ferroelectric (FE-to-AFE) transition, due to the variation of the magnetic parameter /||. Moreover, we also found that the DMIs and Heisenberg isotropic exchange can be manipulated by bi-axial strain, to effectively enhance skyrmion stability. Our findings provide feasible approaches to manipulate the skyrmions, which can be used for the design of next-generation information storage devices.
由于其具有拓扑保护的手性自旋纹理和低能量成本，磁性斯格明子及其有效操控在下一代信息存储和处理设备设计方面颇具前景。因此，它们引起了凝聚态物理和材料科学领域的广泛关注。在此，基于密度泛函理论（DFT）计算和微磁模拟，我们报道了单层CuCrPTe中源自反演对称性破缺和强Dzyaloshinskii-Moriya相互作用（DMI）协同效应的自发形成的直径为2纳米的磁性斯格明子。由于磁参数/||的变化，通过铁电到反铁电（FE-to-AFE）转变可以实现磁性斯格明子的产生和湮灭。此外，我们还发现双轴应变可以操控DMI和海森堡各向同性交换，以有效增强斯格明子稳定性。我们的研究结果提供了操控斯格明子的可行方法，可用于下一代信息存储设备的设计。
