Spin-memory loss induced by bulk spin-orbit coupling at ferromagnet/heavy-metal interfaces
arXiv:2101.11438 · doi:10.1063/5.0039088
Abstract
A spin current through a ferromagnet/heavy-metal interface may shrink due to the spin-flip at the interface, resulting in the spin-memory loss. Here we propose a mechanism of the spin-memory loss. In contrast to other mechanisms based on interfacial spin-orbit coupling, our mechanism is based on the bulk spin-orbit coupling in a heavy-metal. We demonstrate that the bulk spin-orbit coupling induces the entanglement between the spin and orbital degrees of freedom and this spin-orbital entanglement can give rise to sizable spin-flip at the interface even when the interfacial spin-orbit coupling is weak. Our mechanism emphasizes crucial roles of the atomic orbital degree of freedom and induces the strong spin-memory loss near band crossing points between bands of different orbital characters.
arXiv comment4 pages
References in corpus (20)
- Spin torque switching with the giant spin Hall effect of tantalum
- Giant Spin-splitting in the Bi/Ag(111) Surface Alloy
- Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
- Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
- Spin-Diffusion Lengths in Metals and Alloys, and Spin-Flipping at Metal/Metal Interfaces: an Experimentalist's Critical Review
- Role of transparency of platinum-ferromagnet interface in determining intrinsic magnitude of spin Hall effect
- Spin torque study of the spin Hall conductivity and spin diffusion length in platinum thin films with varying resistivity
- Intrinsic spin Hall effect in platinum metal
- Intrinsic Spin and Orbital Hall Effects from Orbital Texture
- Orbital-Angular-Momentum Based Origin of Rashba-Type Surface Band Splitting
- Spin Transport at Interfaces with Spin-Orbit Coupling: Formalism
- Interface enhancement of Gilbert damping from first-principles
- Effective spin-mixing conductance of heavy-metal-ferromagnet interfaces
- Spin-orbit torques in heavy metal/ferromagnet bilayers with varying strength of interfacial spin-orbit coupling
- Microscopic Theory of Rashba Interaction in Magnetic Metal
- Determination of spin Hall effect and spin diffusion length of Pt from self-consistent fitting of damping enhancement and inverse spin-orbit torque measurements
- Disorder Dependence of Interface Spin Memory Loss
- Spin-memory loss due to spin-orbit coupling at ferromagnet/heavy-metal interfaces: Ab initio spin-density matrix approach
- Theory of spin loss at metallic interfaces
- Ballistic spin transport in the presence of interfaces with strong spin-orbit coupling