标题： 由掺杂拓扑绝缘体无序表面磁化动力学驱动的自旋电荷输运 显示英文标题

标题： Spin-charge transport driven by magnetization dynamics on disordered surface of doped topological insulators

摘要： 我们通过使用格林函数技术，理论上研究了掺杂的三维拓扑绝缘体/磁性绝缘体结的无序表面上的自旋和电荷生成以及电子输运。 我们发现，不仅局部的而且非局部的磁化动力学通过掺杂拓扑绝缘体无序表面上的非磁性杂质散射都会引起自旋和电荷电流。 我们还阐明了自旋电流以及电荷密度是由空间不均匀的磁化动力学引起的，自旋电流在无序表面上扩散传播。 利用这些结果，我们在表面自旋和自旋电流生成前后讨论了局部和非局部自旋扭矩，并提供了一种检测自旋电流的方法。 显示英文摘要

摘要： We theoretically study the spin and charge generation along with the electron transport on a disordered surface of a doped three-dimensional topological insulator/magnetic insulator junction by using Green's function techniques. We find that the spin and charge current are induced by not only local but also nonlocal magnetization dynamics through nonmagnetic impurity scattering on the disordered surface of the doped topological insulator. We also clarify that the spin current as well as charge density are induced by spatially inhomogeneous magnetization dynamics, and the spin current diffusively propagates on the disordered surface. Using these results, we discuss both local and nonlocal spin torques before and after the spin and spin current generation on the surface, and provide a procedure to detect the spin current.