摘要
逆自旋霍尔效应是测量材料自旋输运参数(比如自旋霍尔角、自旋扩散长度等)的重要手段。目前关于逆自旋霍尔效应的实验研究比较多,但理论计算相对缺乏。发展高效精准的计算方法十分重要。本文计算了横向自旋阀结构中,逆自旋霍尔信号随磁铁非共线角度的变化关系。我们的计算针对目前最具前景的常规合金Cu Bi和Cu Ir展开。结果表明Cu Bi的逆自旋霍尔信号最强。对计算的一些困难(比如接触电阻的确定等)也做了讨论。结果对深入理解自旋输运具有一定价值。
The inverse spin Hall effect experiment is an important means for spin transport measurement of material parameters （such as the spin Hall angle, the spin diffusion length , etc.）. Currently, there are much more experimental researches on the inverse spin Hall effect than theoretical calculations. In this case, the development of efficient and accurate calculation method is of great importance. In this paper, we calculate the inverse spin Hall signal in a lateral spin valve structure as the function of the non-collinear angle between the two magnets. Our calculations focus on the most promising normal alloys , i.e., CuBi and Culr. The results show that the inverse spin Hall signal of CuBi is the strongest among these alloys. Some of the difficulties for computing （such as the determination of contact resistance, etc.） are also discussed. This research has a certain value for the deep understanding of the spin transport.
出处
《信息记录材料》
2015年第3期52-57,共6页
Information Recording Materials
基金
国家自然科学基金项目(61308038)
