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

Abstract

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.

34 pages, 4 figures

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Cited by in corpus (8)

• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Dirac Spin-Orbit Torques at the Surface of Topological Insulators
• Spin Orbit Torque in two dimensional Antiferromagnetic Topological Insulators
• Microscopic derivation of magnon spin current in a topological insulator/ferromagnet heterostructure
• Spin and charge transport induced by a twisted light beam on a surface of a topological insulator
• Emergence, evolution, and control of multistability in a hybrid topological quantum/classical system
• Spin-torque resonance due to diffusive dynamics at a surface of topological insulator
• Electromagnon on the Surface of Magnetic Topological Insulator