线性和非线性自旋电流响应的异型自旋轨道合系统
D Muñoz-Santana1, Jesús A Maytorena2
1Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California, Apartado Postal 360, 22860 Ensenada, Baja California, Mexico.
Journal of physics. Condensed matter : an Institute of Physics journal
|September 6, 2023
概括
这项研究探讨了使用自旋轨道 (SO) 相互作用在异性质材料中产生自旋电流. 研究人员发现,控制晶体方向和SO合强度可以精确操纵线性和第二波自旋电流,用于自旋电子应用.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 这就是Spintronics.
- 材料科学 材料科学 材料科学
背景情况:
- 旋转轨道 (SO) 相互作用对于在材料中产生旋转电流至关重要.
- 不同类型的系统为控制自旋依赖现象提供了独特的特性.
- 了解线性和第二波 (SH) 旋转反应是先进的旋转器件的关键.
研究的目的:
- 在两个具有SO相互作用的异构型系统中计算线性和SH旋转电流响应.
- 为这些响应函数推导出适用于通用双带哈密尔顿函数的通用表达式.
- 调查材料特性和晶体方向如何影响旋转电流的产生.
主要方法:
- 对线性和SH旋转电流响应函数的一般表达式的导出.
- 用Rashba和k-线性德雷塞尔豪斯SO合的2D电子气体的分析.
- 对一种异性质的2D自由电子气体与异性质的Rashba相互作用的研究.
主要成果:
- 响应光谱的特征 (宽度,形状,大小,频率变化) 取决于晶体的方向.
- 在特定的SU(2) 对称条件下,可以实现消失线性和SH响应张量.
- 线性响应产生平面外的自旋电流,而SH响应产生平面内的自旋电流在异型系统中.
结论:
- 通过选择生长方向和SO强度,可以精确控制旋转电流偏振.
- 不同类型系统表现出明显的线性和SH旋转反应,使得旋转电流生成的操纵.
- 这些发现表明了实现非线性旋转霍尔效应和潜在的旋转电子应用的途径.
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