Generation of non-equilibrium spin-motive force at the surface of a topological insulator induced by current-driven domain wall motion in the magnetic substrate

2025/05/09 by Mehrabani, Reza Fazeli, Abdollahipour, Babak, Mohammadpour, Hakimeh +1
#FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

paper · doi:10.48550/arxiv.2505.05977

Abstract

The generalized Faraday method can be used for computation of spin-motive force (SMF) within the unitary transformation approach. Meanwhile, the unitary transformation approach, which could be employed to obtain an effective collinear exchange interaction of non-collinear magnetic structures, cannot be used when the other parts of the Hamiltonian contain spin-dependent couplings. In the current study, the method of unitary transformation has been generalized to systems with spin-momentum coupling. In this way, the SMF at topological insulator surfaces has been computed analytically.

Citations

• Topological Insulators
• Spin gauge fields: From Berry phase to topological spin transport and Hall effects
• Current-driven excitation of magnetic multilayers
• Berry’s phase for energy bands in solids
• Spin polarization of conduction electrons induced by electric current in two-dimensional asymmetric electron systems

Related

• Spin Torque on Magnetic Textures Coupled to the Surface of a Three-Dimensional Topological Insulator
• Spin-Pumping-Induced Non-Linear Electric Current on the Surface of a Ferromagnetic Topological Insulator
• Edelstein effects, spin-transfer torque, and spin pumping caused by pristine surface states of topological insulators
• Exchange tensors, generalized RKKY interactions, and magnetization dynamics in heterostructures of ferromagnets and topological insulators
• Microscopic approach to current-driven domain wall dynamics