Gauge Field Formulation of Adiabatic Spin Torques

Abstract

Previous calculation of spin torques for small-amplitude magnetization dynamics around a uniformly magnetized state [J. Phys. Soc. Jpn. {\bf 75} (2006) 113706] is extended here to the case of finite-amplitude dynamics. This is achieved by introducing an `` adiabatic'' spin frame for conduction electrons, and the associated SU(2) gauge field. In particular, the Gilbert damping is shown to arise from the time variation of the spin-relaxation source terms in this new frame, giving a new physical picture of the damping. The present method will allow a `` first-principle'' derivation of spin torques without any assumptions such as rotational symmetry in spin space.

4 pages, 3 figures

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Cited by in corpus (27)

• Microscopic approach to current-driven domain wall dynamics
• Current-induced domain wall motion in Rashba spin-orbit system
• Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets
• Spin pumping by a field-driven domain wall
• Effective gauge field theory of spintronics
• Symmetry and the macroscopic dynamics of antiferromagnetic materials in the presence of spin-polarized current
• Spin motive force induced by Rashba interaction in the strong sd coupling regime
• Theory of Domain Wall Dynamics under Current
• Theory of spin magnetohydrodynamics
• Calculation of current-induced torque from spin continuity equation
• Spin and charge transport induced by gauge fields in a ferromagnet
• Current-induced non-adiabatic spin torques and domain wall motion with spin relaxation in a ferromagnetic metallic wire
• Microscopic theory of magnon-drag electron flow in ferromagnetic metals
• Hole spin relaxation and coefficients in Landau-Lifshitz-Gilbert equation in ferromagnetic GaMnAs
• Microscopic Calculation of Spin Torques in Textured Antiferromagnets
• Non-local Spin-charge Conversion via Rashba Spin-Orbit Interaction
• Adiabatic and Nonadiabatic Spin-transfer Torques in Antiferromagnets
• Magnon Current Generation by Dynamical Distortion
• Existence of vertical spin stiffness in Landau-Lifshitz-Gilbert equation in ferromagnetic semiconductors
• Current-controlled chirality dynamics in a mesoscopic magnetic domain wall
• Effect of spin-conserving scattering on Gilbert damping in ferromagnetic semiconductors
• Spin-wave-induced spin torque in Rashba spin-orbit coupling system
• Spin Hall Current and Spin-transfer Torque in Ferromagnetic Metal
• Spin torque due to diffusive spin current in magnetic texture
• Topological spin Hall effect in antiferromagnets driven by vector Néel chirality
• Alternating Current-induced Interfacial Spin-transfer Torque
• Current-Induced Spin-Wave Doppler Shift in Antiferromagnets