Influence of spin-orbit and spin-Hall effects on the spin Seebeck current beyond linear response
arXiv:1812.09270 · doi:10.1103/PhysRevB.99.024410
Abstract
We study the spin transport theoretically in heterostructures consisting of a ferromagnetic metallic thin film sandwiched between heavy-metal and oxide layers. The spin current in the heavy metal layer is generated via the spin Hall effect, while the oxide layer induces at the interface with the ferromagnetic layer a spin-orbital coupling of the Rashba type. Impact of the spin Hall effect and Rashba spin-orbit coupling on the spin Seebeck current is explored with a particular emphasis on nonlinear effects. Technically, we employ the Fokker-Planck approach and contrast the analytical expressions with full numerical micromagnetic simulations. We show that when an external magnetic field is aligned parallel (antiparallel) to the Rashba field, the spin-orbit coupling enhances (reduces) the spin pumping current. In turn, the spin Hall effect and the Dzyaloshinskii-Moriya interaction are shown to increase the spin pumping current.
arXiv commentto appear in Phys. Rev. B
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Cited by in corpus (5)
- Microscopic Origin of Spin-Orbit Torque in Ferromagnetic Heterostructures: A First Principles Approach
- Rectification of the spin Seebeck current in noncollinear antiferromagnets
- Stratonovich-Ito integration scheme in ultrafast spin caloritronics
- Electron-magnon spin conversion and magnonic spin pumping in antiferromagnet/heavy metal heterostructure
- Quantum noise in the spin transfer torque effect