Yang Chao, Zhou Da-Kun, Wang Ya-Ru, Wang Zheng-Chuan
College of Mechanical and Electrical Engineering, Wuyi University, Wuyishan 354300, China.
School of Physical Sciences, University of Chinese Academy of Sciences, Beijng 100049, China.
Materials (Basel). 2022 Jul 25;15(15):5149. doi: 10.3390/ma15155149.
In this paper, we investigate the spin-orbit torque and transport property in a 2D Rashba ferromagnetic electron gas. The longitudinal conductivity can be divided into two parts: the first term is determined by the charge density and is independent of the spin degrees of freedom. The second term depends on the two bands that spin in the opposite directions, and it is directly proportional to spin-orbit torque regardless of the band structure and temperature. This is a general and underlying relation between the transport property and spin-orbit torque. Moreover, we show the impacts of the spin-orbit coupling constant and Fermi energy on transverse conductivity and spin-orbit torque, which is helpful for relevant experiments.
在本文中，我们研究了二维Rashba铁磁电子气中的自旋轨道转矩和输运性质。纵向电导率可分为两部分：第一项由电荷密度决定，且与自旋自由度无关。第二项取决于两个自旋方向相反的能带，并且无论能带结构和温度如何，它都与自旋轨道转矩成正比。这是输运性质与自旋轨道转矩之间的一种普遍且基本的关系。此外，我们展示了自旋轨道耦合常数和费米能量对横向电导率和自旋轨道转矩的影响，这对相关实验很有帮助。
