在RuO_{2}中旋电荷转换的铁磁接口工程
Dongchao Yang1, Zhaoqing Li2, Yu Dai3
1Tongji University, School of Physics Science and Engineering, Shanghai 200092, China.
Physical review letters
|January 30, 2026
概括
变磁铁提供了新的自旋电荷转换途径. 研究人员证明,相邻的铁磁铁控制了这种转化为二氧化的过程,使得定制的自旋磁器件成为可能.
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:
- 旋转轨道扭矩效率通常受散装材料特性限制.
- D波变磁体引入了一种新的非相对论自旋电荷转换机制.
- 逆自旋霍尔效应是一种已知的自旋-电荷转换通道.
研究的目的:
- 调查相邻铁磁体在改变磁性氧化物中决定自旋电荷转换中的作用.
- 探索在旋电荷转换中的散量和接口效应之间的相互作用.
- 建立铁磁接口作为控制自旋电子设备属性的方法.
主要方法:
- 在二氧化鲁 (RuO2) 双层上进行了回测量,使用了铁石榴石 (YIG) 和铁 (Py) 铁磁铁.
- 使用晶体和多晶体RuO2.
- 使用第一原则计算来分析电子结构和混合化.
- 在接口上研究超薄金 (Au) 间隔器的影响.
主要成果:
- 在RuO2/YIG和RuO2/Py双层中观察到相反的有效旋转角.
- 在RuO2/YIG接口上插入了一个Au间距器,反转了旋电荷转换信号.
- RuO2/YIG接口表现出一种主要的逆拉什巴-埃德尔斯坦效应,而RuO2/Py则显示出大量的逆旋霍尔效应.
- 第一个原则的计算揭示了界面选择性带杂交,Rashba表面状态在YIG界面上存活,但被Py灭.
结论:
- 铁磁接口提供了一种确定性方法,以量身定制变磁氧化物中的自旋电荷转换.
- 邻近铁磁体的选择显著影响主导的自旋电荷转换机制 (散装与接口).
- 这种控制为开发无场,低分散的自旋电子记忆器件铺平了道路.
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