Theory of spin-Hall magnetoresistance in the AC (terahertz) regime
arXiv:2104.06518 · doi:10.1103/PhysRevB.104.024415
Abstract
In bilayers consisting of a normal metal (N) with spin-orbit coupling and a ferromagnet (F), the combination of the spin-Hall effect, the spin-transfer torque, and the inverse spin-Hall effect gives a small correction to the in-plane conductivity of N, which is referred to as spin-Hall magnetoresistance (SMR). We here present a theory of the SMR and the associated off-diagonal conductivity corrections for frequencies up to the terahertz regime. We show that the SMR signal has pronounced singularities at the spin-wave frequencies of F, which identifies it as a potential tool for all-electric spectroscopy of magnon modes. A systematic change of the magnitude of the SMR at lower frequencies is associated with the onset of a longitudinal magnonic contribution to spin transport across the F-N interface.
arXiv comment21 pages, 9 figures
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- Controlling the orbital Hall effect in gapped bilayer graphene in the terahertz regime
- Probing magnetic anisotropy and spin-reorientation transition in 3D antiferromagnet, HoDyFeOPt using spin Hall magnetoresistance
- Finite-frequency spin conductance of a ferro-/ferrimagnetic-insulator|normal-metal interface
- Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
- Magnon-mediated electric current drag and nonlocal spin-Peltier effect in the ac regime
- Theory of nonlinear magnetoelectric transport effects in normal-metal magnetic-insulator heterostructures