论文标题
Fabry-Pérot谐振涡流和磁性绝缘体收缩的磁性磁通磁性
Fabry-Pérot resonant vortices and magnetoconductance in topological insulator constrictions with magnetic barriers
论文作者
论文摘要
由于没有反向散射，二维时间反转拓扑绝缘子的边缘在宽带上支撑了宽带的完美螺旋电导。在这里，我们通过沿色带引入收缩来研究拓扑绝缘子纳米骨的传输特性的变化。该设置允许边缘状态杂交，从而导致收缩末端的反射。我们发现，沿着一个边缘运行的电子状态可以多次沿对面的边缘反射，从而在收缩中产生Fabry-Pérot谐振涡旋，并具有明确的电导峰。我们表明，磁性屏障可以操纵这些峰并获得系统自旋分辨磁电的重大变化。
The edge states of two-dimensional time-reversal topological insulators support a perfect helical conductance on wide ribbons due to the absence of backscattering. Here, we study the changes in the transport properties of topological insulator nanoribbons by introducing a constriction along the ribbon. This setup allows the edge states to hybridize, leading to reflections at the ends of the constriction. We find that the electronic states running along one edge can be reflected back along the opposite edge multiple times, giving rise to Fabry-Pérot resonant vortices within the constriction with well-defined conductance peaks. We show that magnetic barriers allow one to manipulate these peaks and obtain significant changes in the system spin-resolved magnetoconductance.
