在多铁单层MnOBr中调节磁性 skyrmions
Cong Hou1,2, Yibo Sun1,2, Yuhang Lu1,2
1State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China. junni@mail.tsinghua.edu.cn.
Nanoscale
|October 2, 2024
概括
像MnOBr这样的新型二维多铁材料使磁性 skyrmion 的发现成为可能. 这些材料允许使用磁场和应变控制skyrmion,为旋转电子设备铺平了道路.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
背景情况:
- 二维 (2D) 多铁材料为探索异国情调的磁现象提供了一个独特的平台.
- 磁性 skyrmions,拓保护的旋转纹理,对下一代旋转电子应用有希望.
研究的目的:
- 研究磁性 skyrmions 的特性和控制在一个新的 2D 多铁氧单层,MnOBr.Br.
- 在外部刺激下探索相位过渡和 skyrmion 格子形成.
主要方法:
- 第一个原则是计算以确定电子和磁性质.
- 蒙特卡洛模拟用于模拟旋转动力学和相位过渡.
- 机器学习技术用于在磁场和应变下构建相位图.
主要成果:
- 单层MnOBr在没有外部磁场的情况下表现出内在的磁性 skyrmions.
- 外部磁场诱导从迷宫领域形成一个 skyrmion 格子.
- 一个全面的相位图显示了由磁场和双轴应变影响的旋转纹理过渡.
- 具有Janus CdClBr的异构结构通过极化切换证明了受控的创建和消灭 skyrmions.
结论:
- 单层MnOBr是一种有前途的材料,用于产生内在磁性 skyrmion.
- 外部刺激和异构结构工程为 skyrmion 操纵提供了有效的途径.
- 这些发现突显了MnOBr在开发先进的自旋电子设备方面的潜力.
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