Microscopic Theory of the Spin Hall Magnetoresistance

Abstract

We consider a microscopic theory for the spin Hall magnetoresistance (SMR). We generally formulate a spin conductance at an interface between a normal metal and a magnetic insulator in terms of spin susceptibilities. We reveal that SMR is composed of static and dynamic parts. The static part, which is almost independent of the temperature, originates from spin flip caused by an interfacial exchange coupling. However, the dynamic part, which is induced by the creation or annihilation of magnons, has an opposite sign from the static part. By the spin-wave approximation, we predict that the latter results in a nontrivial sign change of the SMR signal at a finite temperature. In addition, we derive the Onsager relation between spin conductance and thermal spin-current noise.

arXiv comment10 pages, 3 figures

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Cited by in corpus (14)

• Spin pumping of two-dimensional electron gas with Rashba and Dresselhaus spin-orbit interactions
• Microscopic theory of spin Seebeck effect in antiferromagnets
• Spin Pumping into Anisotropic Dirac Electrons
• Effect of vertex corrections on the enhancement of Gilbert damping in spin pumping into a two-dimensional electron gas
• Multi-Particle Tunneling Transport at Strongly-Correlated Interfaces
• Spin current at a magnetic junction as a probe of the Kondo state
• Theory of inverse Rashba-Edelstein effect induced by spin pumping into a two-dimensional electron gas
• Spin-pumping in superconductor-antiferromagnetic insulator bilayers
• Twisted bilayer graphene reveals its flat bands under spin pumping
• Probing magnetic anisotropy and spin-reorientation transition in 3D antiferromagnet, Ho${}_{0.5}$Dy${}_{0.5}$FeO${}_3|$Pt using spin Hall magnetoresistance
• Spin-Hall magnetoresistance in quasi-two-dimensional antiferromagnetic insulator/metal bilayer systems
• Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
• Microscopic theory of Rashba-Edelstein magnetoresistance
• Fluctuation theorem for spin transport at insulating ferromagnetic junctions