以质子控制的Dzyaloshinskii-Moriya相互作用和拓霍尔效应在化石氨酸中
Ya-Ting Xu1, Xu Niu1, Yi-Feng Zhao1
1Key Laboratory of Polar Materials and Devices (Ministry of Education), Shanghai Center of Brain-inspired Intelligent Materials and Devices, Department of Electronics, East China Normal University, Shanghai 200241, China. bbchen@phy.ecnu.edu.cn.
通过化进行质子兴奋剂,通过增加Dzyaloshinskii-Moriya相互作用 (DMI) 来增强氨酸薄膜中的拓霍尔效应 (THE). 这种方法可以控制磁纹理而没有结构变化,为氧化物电子提供了一个新的策略.
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
- 这就是Spintronics.
背景情况:
- 拓霍尔效应 (THE) 对于探测像 skyrmions 这样的拓旋转纹理至关重要.
- 中酸 (SRO) 薄膜与颠倒对称性和Dzyaloshinskii-Moriya相互作用 (DMI) 的破坏有关.
- 控制 DMI 和 SRO 中的 THE 是先进磁性应用的关键.
研究的目的:
- 研究质子兴奋剂作为SRO上膜中控制DMI和THE的方法.
- 了解质子兴奋剂对磁性特性的影响背后的原子尺度机制.
- 探索化的潜力,以操纵氧化物中的拓旋转纹理.
主要方法:
- 通过Pt电极辅助化,将质子引入SRO薄膜 (>10nm厚度).
- 第一个原则计算,以建模质子兴奋剂的影响.
- 原子级观测以确认结构变化和质子结合.
- 在化SRO (H-SRO) 中测量THE和磁性.
主要成果:
- 通过化成功将每个单元细胞中约0.8个质子纳入SRO膜,以最小的晶格膨胀或氧气空缺.
- 质子兴奋剂诱导Ru和O原子的垂直移位,显著增强DMI并导致THE的出现.
- 化SRO展示了增强的THE值和独特的拓信号,而没有经历结构过渡.
结论:
- 催化辅助化是一种有效的策略,用于在相关的氧化物薄膜中调整DMI和THE.
- 质子兴奋剂为SRO中操纵磁纹和拓现象提供了一条新的途径.
- 这种方法为开发基于拓自旋纹理的新型自旋电子设备提供了潜力.
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