Dynamics of localized spins coupled to the conduction electrons with charge/spin currents

Abstract

The effects of the charge/spin currents of conduction electrons on the dynamics of the localized spins are studied in terms of the perturbation in the exchange coupling $J_K$ between them. The equations of motion for the localized spins are derived exactly up to $O(J_K^2)$, and the equations for the two-spin system is solved numerically. It is found that the dynamics depends sensitively upon the relative magnitude of the charge and spin currents, i.e., it shows steady state, periodic motion, and even chaotic behavior. Extension to the multi-spin system and its implications including possible ``spin current detector'' are also discussed.

5 pages, 4 figures, REVTeX

References in corpus (8)

• Spin current and magneto-electric effect in non-collinear magnets
• Dissipationless Quantum Spin Current at Room Temperature
• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Current-spin coupling for ferromagnetic domain walls in fine wires
• Effect of Spin Current on Uniform Ferromagnetism: Domain Nucleation
• Decoherence of localized spins interacting via RKKY interaction

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• Spintronics meets nonadiabatic molecular dynamics: Geometric spin torque and damping on noncollinear classical magnetism due to electronic open quantum system
• Electric field-induced spin textures in a superlattice with Rashba and Dresselhaus spin-orbit coupling
• Dynamical exchange interaction between localized spins out of equilibrium
• Transient spin dynamics in a single-molecule magnet
• Voltage dependence of Landau-Lifshitz-Gilbert damping of a spin in a current driven tunnel junction
• Gilbert damping in metallic ferromagnets from Schwinger-Keldysh field theory: Intrinsically nonlocal and nonuniform, and made anisotropic by spin-orbit coupling
• Annihilation of topological solitons in magnetism with spin wave burst finale: The role of nonequilibrium electrons causing nonlocal damping and spin pumping over ultrabroadband frequency range
• When can localized spins interacting with conduction electrons in ferro- or antiferromagnets be described classically via the Landau-Lifshitz equation: Transition from quantum many-body entangled to quantum-classical nonequilibrium states
• Accessing long timescales in the relaxation dynamics of spins coupled to a conduction-electron system using absorbing boundary conditions
• Long-time relaxation dynamics of a spin coupled to a Chern insulator
• Spin Berry curvature of the Haldane model
• Emergent Non-Abelian Gauge Theory in Coupled Spin-Electron Dynamics
• Dynamical exchange and phase induced switching of a localized molecular spin
• Nonequilibrium dynamics in a spin valve with noncollinear magnetization
• Non-Hamiltonian dynamics of indirectly coupled classical impurity spins
• Controlling the real-time dynamics of a spin coupled to the helical edge states of the Kane-Mele model
• Microscopic theory of spin friction and dissipative spin dynamics
• Landau-Lifshitz damping from Lindbladian dissipation in quantum magnets
• Prerelaxation in quantum, classical, and quantum-classical two-impurity models