Rashba-induced spin electromagnetic fields in a strong sd coupling regime

Abstract

Spin electromagnetic fields driven by the Rashba spin-orbit interaction, or Rashba-induced spin Berry's phase, in ferromagnetic metals is theoretically studied based on the Keldysh Green's function method. Considering a limit of strong sd coupling without spin relaxation (adiabatic limit), the spin electric and magnetic fields are determined by calculating transport properties. The spin electromagnetic fields turn out to be expressed in terms of a Rashba-induced effective vector potential, and thus they satisfy the Maxwell's equation. In contrast to the conventional spin Berry's phase, the Rashba-induced one is linear in the gradient of magnetization profile, and thus can be extremely large even for slowly varying structures. We show that the Rashba-induced spin Berry's phase exerts the Lorentz force on spin resulting in a giant spin Hall effect in magnetic thin films in the presence of magnetization structures. Rashba-induced spin magnetic field would be useful to distinguish between topologically equivalent magnetic structures.

15pages, 5figures

References in corpus (8)

• Microscopic approach to current-driven domain wall dynamics
• Electron Transport Driven by Nonequilibrium Magnetic Textures
• Spin pumping by a field-driven domain wall
• Spin Pumping of Current in Non-Uniform Conducting Magnets
• Spin motive force induced by Rashba interaction in the strong sd coupling regime
• Effects of non-adiabaticity on the voltage generated by a moving domain wall
• Inverse Spin Hall Effect Driven by Spin Motive Force
• Monopoles in ferromagnetic metals

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• Effective Hamiltonian theory for nonreciprocal light propagation in magnetic Rashba conductor
• Electrodynamics in Skyrmions Merging
• Theory of anomalous optical properties of bulk Rashba conductor
• Non-local Spin-charge Conversion via Rashba Spin-Orbit Interaction
• Mixed topology ring states for Hall effect and orbital magnetism in skyrmions of Weyl semimetals
• Coupling theory of emergent spin electromagnetic field and electromagnetic field