Intrinsic spin Hall effect in systems with striped spin-orbit coupling
Intrinsic spin Hall effect in systems with striped spin-orbit coupling
复制标题
条纹自旋轨道耦合系统中的本征自旋霍尔效应
DOI：
10.1209/0295-5075/112/17004
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Roberto Raimondi
中科院分区：
文献类型：
--
作者：
Goetz Seibold;S. Caprara;M. Grilli;Roberto Raimondi
由结构反转不对称性引起的Rashba自旋-轨道耦合自旋和动量自由度，为自旋电子效应和器件提供了合适的（并且非常深入研究的）环境。在这个框架中，自旋霍尔效应是一个关键因素，因为它允许在没有磁场的情况下操纵自旋自由度。在这里，我们表明，在无序的存在下，条纹调制的二维电子气，影响密度和Rashba自旋轨道耦合，产生一个有限的自旋霍尔电导率与相应的均匀系统。我们建议，这种机制可以利用自旋霍尔器件的实际实现。这可以在具有周期性顶栅的氧化物界面处实现，从而导致感应的自旋电流和电荷电流之间的大比率。
The Rashba spin-orbit coupling arising from structure inversion asymmetry couples spin and momentum degrees of freedom providing a suitable (and very intensively investigated) environment for spintronic effects and devices. In this framework, the spin Hall effect is a crucial ingredient since it allows for the manipulation of spin degrees of freedom without magnetic fields. Here we show that, in the presence of disorder, a striped modulation of a two-dimensional electron gas, affecting both density and Rashba spin-orbit coupling, gives rise to a finite spin Hall conductivity in contrast with the corresponding homogeneous system. We suggest that this mechanism can be exploited for a practical realization of a spin Hall device. This could be implemented at oxide interfaces with periodic top gating, leading to a large ratio between the induced spin and charge currents.
影响因子：
2.4
作者：
R. Raimondi;P. Schwab;C. Gorini;G. Vignale
通讯作者：
R. Raimondi;P. Schwab;C. Gorini;G. Vignale