论文标题
二维旋转摩托车锁定状态的自旋传输和动态特性
Spin transport and dynamic properties of two-dimensional spin-momentum locked states
论文作者
论文摘要
带有旋转摩托杆锁定表面或界面状态的材料为研究物理学和电荷旋转电流转换的应用提供了有趣的操场。为了表征其非平衡磁性和传输性能，在存在时间依赖性的外部磁场和接触中的自旋注入的情况下，我们引入了三个宏观变量：矢量性螺旋磁化，缩放器螺旋磁化强度和常规磁化强度。我们通过使用Spinor Boltzmann方法与Spin-Momentum锁定状态的对称性相一致的碰撞项来得出这些变量的一组封闭动力方程。通过求解动态方程，我们可以预测几种在实验上可以访问的有趣的磁性和传输现象，包括对AC施加的磁场的磁谐振响应，电荷旋转转换以及由螺旋磁化动力学诱导的旋转电流。
Materials with spin-momentum locked surface or interface states provide an interesting playground for studying physics and application of charge-spin current conversion. To characterize their non-equilibrium magnetic and transport properties in the presence of a time-dependent external magnetic field and a spin injection from a contact, we introduce three macroscopic variables: a vectorial helical magnetization, a scaler helical magnetization, and the conventional magnetization. We derive a set of closed dynamic equations for these variables by using the spinor Boltzmann approach with the collision terms consistent with the symmetry of spin-momentum locked states. By solving the dynamic equations, we predict several intriguing magnetic and transport phenomena which are experimentally accessible, including magnetic resonant response to an AC applied magnetic field, charge-spin conversion, and spin current induced by the dynamics of helical magnetization.
