由光诱导的单轴应变所驱动的多级别 skyrmion 阶段过渡
Bei Ding1,2, Yadong Wang1,3, Jiahui Meng1
1Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.
Science advances
|May 14, 2025
概括
研究人员在多层中使用高达1%的光诱导单轴应变实现了多阶段的 skyrmion 阶段过渡. 这种菌株工程使得新的斯基米安行为和潜在的先进的旋转器件设备成为可能.
科学领域:
- 这就是Spintronics.
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 应变工程对于使用 skyrmion 托管多层的 spintronic 设备至关重要.
- 传统的应变水平 (<0.5%) 限制了对独特材料性能的探索.
- 单轴应变对 skyrmions 的异型效应仍然未被充分研究.
研究的目的:
- 为了研究由大量的单轴应变引起的多阶段 skyrmion 阶段过渡.
- 探索光诱导的应变大小和方向对斯基尔米翁行为的影响.
- 为了展示一种新的方法来控制用于spintronic应用的 skyrmions.
主要方法:
- 用灵活的液晶薄膜集成斯基米昂宿主多层.
- 使用高达1%的光感应单轴应变.
- 微磁模拟以了解潜在的物理机制.
主要成果:
- 斯基尔米翁的过渡对应变量大小和方向敏感.
- 与条纹平行的细菌菌株 (<0.6%) 诱导了 skyrmions.
- 应变 (>0.6%) 诱导垂直延长 (负波桑效应) 和随后的回归到条纹.
- 在0.8%的应变下观察到高达40%的变形.
结论:
- 压力诱导的Dzyaloshinskii-Moriya相互作用驱动器的异型调制观察到 skyrmion 现象.
- 这种方法提供了一种灵活的,光激活的方法,用于实质性的单轴应变控制.
- 开发低功耗,多态自旋电子设备的潜力.
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