论文标题
在时间依赖的Rashba系统中的可持续旋转电流
Sustainable spin current in the time-dependent Rashba system
论文作者
论文摘要
考虑到2DEG RASHBA系统中自旋电流和自旋极化的产生，其中自旋轨道耦合（SOC）通过交流栅极电压调节。通过使用非亚洲量规场方法，我们显示了额外的电场的存在。即使在存在杂质散射的情况下，该领域也会引起旋转电流，并且与Rashba SoC强度的时间调节有关。此外，可以通过调节RashBA SOC强度的调制频率来控制自旋进动。结果表明，在高调制频率下，抑制了进液运动，因此可以在2维eg中维持电子自旋极化
The generation of spin current and spin polarization in 2DEG Rashba system is considered, in which the spin-orbital coupling (SOC) is modulated by an ac gate voltage. By using non-Abelian gauge field method, we show the presence of an additional electric field. This field induces a spin current generated even in the presence of impurity scattering and is related to the time-modulation of the Rashba SOC strength. In addition, the spin precession can be controlled by modulating the modulation frequency of the Rashba SOC strength. It is shown that at high modulation frequency, the precessional motion is suppressed so that the electron spin polarization can be sustained in the 2DEG
