论文标题
拓扑绝缘子薄膜中的Zitterbewegung介导的rkky耦合
Zitterbewegung-mediated RKKY coupling in topological insulator thin films
论文作者
论文摘要
使用多波段分解方法研究了拓扑绝缘子（Ti）薄膜中流动电子的动力学。我们表明，2D膜中的电子轨迹是各向异性的，并且被限制在特征区域内。值得注意的是，电子轨迹的限制和各向异性与Ti系统的拓扑相变相关，可以通过调整膜厚度和/或施加平面磁场来控制。此外，可以在相变点的Ti薄膜系统中实现持久的电子波袋振荡，这可能有助于对抖动运动的实验检测（Zitterbewegung）。还讨论了电子运动的微观图像在解释其他与传输相关效果的含义，例如，也讨论了电子介导的Ti薄膜系统中电子介导的Rkky耦合。
The dynamics of itinerant electrons in topological insulator (TI) thin films is investigated using a multi-band decomposition approach. We show that the electron trajectory in the 2D film is anisotropic and confined within a characteristic region. Remarkably, the confinement and anisotropy of the electron trajectory are associated with the topological phase transition of the TI system, which can be controlled by tuning the film thickness and/or applying an in-plane magnetic field. Moreover, persistent electron wavepacket oscillation can be achieved in the TI thin film system at the phase transition point, which may assist in the experimental detection of the jitter motion (Zitterbewegung). The implications of the microscopic picture of electron motion in explaining other transport-related effects, e.g., electron-mediated RKKY coupling in the TI thin film system, are also discussed.
