通过旋转电流探测Rashba表面上的旋转动量锁定
José E Abrão1, Eudes Gomes da Silva1,2, Gilberto Rodrigues-Junior3
1Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, Pernambuco, Brazil.
ACS applied materials & interfaces
|July 16, 2024
概括
研究人员在膜中探索了旋转动量锁定,通过反向Rashba-Edelstein效应,通过反向Rashba-Edelstein效应找到对电荷电流的精确控制. 这为低功率的自旋电子设备打开了大门.
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:
- 旋转动量锁定是一种量子力学现象,其中电子旋转与它的动量有关.
- 拉什巴效应描述了在缺乏反向对称性的系统中旋转轨道相互作用,导致旋转分裂的能量带.
- 反 (Sb) 是一种重元素,具有拓表面状态和自旋电子应用的潜力.
研究的目的:
- 为了研究反 (Sb) 薄膜中的Rashba状态上的旋转动量锁定现象.
- 用自旋和外部电荷电流揭示Sb表面状态的拓性质.
- 通过反向Rashba-Edelstein效应来证明电荷电流的精确操纵.
主要方法:
- 旋转试验,以产生非平衡旋转积累.
- 外部电荷电流的应用用于探头旋转动量锁定.
- 利用逆拉什巴-埃德尔斯坦效应将旋转积累转化为电荷电流.
- 自旋和自旋动量锁定自旋之间的动态相互作用的分析.
主要成果:
- 在Sb薄膜中证明了对Sb薄膜中逆拉什巴-埃德尔斯坦效应产生的电荷电流的方向和大小的精确控制.
- 观察到平衡之外的抽旋转和旋转动量锁定的流动旋转之间的动态相互作用.
- 证实了这些旋转与产生的电荷电流之间的垂直关系.
- 鉴定了Sb作为一个有前途的材料,由于其拓的表面状态spintronics.
结论:
- 反弹片在他们的Rashba表面状态上表现出显著的旋转动量锁定.
- 在Sb中,Rashba-Edelstein反向效应允许有效地操纵电荷电流.
- Sb纳米结构适用于开发低功率的旋转子逻辑门,可在微安培电流下运行.
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