本文研究了在自旋轨道耦合作用下一维引线中的电子电流及其通过两个触点注入金属导体中的情况,形成一个闭环。当施加外部电势时,时间反转对称性被打破,对电流有贡献的循环电子的波矢量k与自旋有关。由于波函数相位取决于矢量k,电路中的闭合路径会产生与自旋相关的电流干扰。这创造了一个物理场景,其中自旋极化电流出现,即使在没有外部磁场或磁性材料的情况下。可以在系统的参数空间中找到点,取决于它的几何形状,费米能量和自旋轨道强度的值,参与电流的电子状态只有一个自旋,创造一个高的和完全自旋极化的电导。对于几十meV的潜力,可以获得μA量级的自旋极化电流。所获得的电子电流的特性使所提出的器件成为自旋电子学应用的潜在重要工具。
The paper studies the electronic current in a one-dimensional lead under the effect of spin-orbit coupling and its injection into a metallic conductor through two contacts, forming a closed loop. When an external potential is applied, the time reversal symmetry is broken and the wave vector k of the circulating electrons that contribute to the current is spin-dependent. As the wave function phase depends upon the vector k, the closed path in the circuit produces spin-dependent current interference. This creates a physical scenario in which a spin-polarized current emerges, even in the absence of external magnetic fields or magnetic materials. It is possible to find points in the system\'s parameter space and, depending upon its geometry, the value of the Fermi energy and the spin-orbit intensities, for which the electronic states participating in the current have only one spin, creating a high and totally spin-polarized conductance. For a potential of a few tens of meV, it is possible to obtain a spin-polarized current of the order of μA. The properties of the obtained electronic current qualify the proposed device as a potentially important tool for spintronics applications.