Green's function representation of spin pumping effect
arXiv:1611.07587 · doi:10.1103/PhysRevB.94.224412
Abstract
In this study, current pumping by an external potential is studied on the basis of the Keldysh Green's function method, and a pumping formula written in terms of retarded and advanced Green's functions is obtained. It is shown that pumping is essentially driven by a change of particle distribution before and after an external perturbation. The formula is used to study the spin pumping effect in the case of strong sd exchange interaction, and the driving field is identified to be the spin gauge field. At the lowest order in the precession frequency of magnetization, the spin gauge field works as a constant potential, and the system is shown to reduce to a static problem of spin current generation by a time-independent potential with off-diagonal spin components.
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Cited by in corpus (7)
- Effective gauge field theory of spintronics
- Consistent microscopic analysis of spin pumping effects
- Evidence of Pure Spin-Current Generated by Spin Pumping in Interface Localized States in Hybrid Metal-Silicon-Metal Vertical Structures
- Spin transfer and spin pumping in disordered normal metal-antiferromagnetic insulator systems
- High-harmonic generation in spin and charge current pumping at ferromagnetic or antiferromagnetic resonance in the presence of spin-orbit coupling
- Spin backflow: a non-Markovian effect on spin pumping
- Nonadiabaticity in spin pumping under relaxation