Antisymmetric spin filtering in one-dimensional electron systems with uniform spin-orbit coupling
Antisymmetric spin filtering in one-dimensional electron systems with uniform spin-orbit coupling
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DOI：
10.1103/physrevlett.90.256601
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发表时间：
2003-06-27
影响因子：
8.6
通讯作者：
Seba, P
中科院分区：
文献类型：
--
作者：
Streda, P;Seba, P
我们从理论上分析了使用铁磁门作为自旋极化滤波器的可能性，用于在具有强 Rashba 自旋轨道相互作用的半导体异质结构中形成的一维电子系统。所提出的装置基于由于弱磁场的存在而打破时间反转对称性的效应。对于适当的强度和磁场方向，电子能谱中会出现一个能量区间，其中自旋态的方向由电子速度的方向控制。如果费米能量落入该能量区间，则会导致电子流的自然自旋极化。
We theoretically analyze the possibility to use a ferromagnetic gate as a spin-polarization filter for one-dimensional electron systems formed in semiconductor heterostructures showing strong Rashba spin-orbit interaction. The proposed device is based on the effect of the breaking time-reversal symmetry due to the presence of weak magnetic fields. For a proper strength and magnetic field orientation there appears an energy interval in the electron energy spectrum at which the orientation of spin states is controlled by the direction of the electron velocity. It leads to the natural spin polarization of the electron current if the Fermi energy falls into this energy interval.