磁调制量子结构的自旋过滤特性  

Spin Filtering in Magnetically Modulated Quantum Structures

作　　者：张桂莲[1] 卢卯旺[1] 唐孝武 

机构地区：[1]湖南科技学院电子工程与物理系,湖南永州425100 [2]永州市四中,湖南永州425100

出　　处：《湖南科技学院学报》2009年第4期45-47,共3页Journal of Hunan University of Science and Engineering

摘　　要：基于杂化磁调制量子结构,我们从理论上提出了一电子自旋过滤器,并研究了其自旋输运性质。实验上,其可以通过在半导体异质结表面沉积磁化方向不同的铁磁条带形成。通过对真实InAs材料系统的计算,发现这种系统具有很强的电子自旋极化效应,其自旋极化度在共振时几乎达到100%。因此,该结构可以用于电子自旋过滤器。We present a spin filtering device and study on the electron spin transport in a magnetically modulated quantum structure, which can be realized by depositing two ferromagnetic stripes with different magnetization on the top of a semiconductor heterostructure. By numerical calculations for the realistic InAs material, it is show that this kind of system possesses a considerable spin polarization effect, and its degree can reach 100% at resonance. Thus, our considered systems can be used as spin filters.

关 键 词：磁调制量子结构 自旋极化 自旋过滤 

分 类 号：TN304.01[电子电信—物理电子学]