Spin diffusion and torques in disordered antiferromagnets
arXiv:1608.00140 · doi:10.1088/1361-648X/aa521d
Abstract
We have developed a drift-diffusion equation of spin transport in collinear bipartite metallic antiferromagnets. Starting from a model tight-binding Hamiltonian, we obtain the quantum kinetic equation within Keldysh formalism and expand it to the lowest order in spatial gradient using Wigner expansion method. In the diffusive limit, these equations track the spatio-temporal evolution of the spin accumulations and spin currents on each sublattice of the antiferromagnet. We use these equations to address the nature of spin transfer torque in (i) a spin-valve composed of a ferromagnet and an antiferromagnet, (ii) a metallic bilayer consisting in an antiferromagnet adjacent to a heavy metal possessing spin Hall effect, and in (ii) a single antiferromagnet possessing spin Hall effect. We show that the latter can experience a self-torque thanks to the non-vanishing spin Hall effect in the antiferromagnet.
15 pages, 2 Figures
References in corpus (36)
- Spin torque switching with the giant spin Hall effect of tantalum
- Antiferromagnetic spintronics
- New Perspectives for Rashba Spin-Orbit Coupling
- Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
- Electrical switching of an antiferromagnet
- Spin Seebeck insulator
- Bose-Einstein Condensation in Magnetic Insulators
- Mechanisms of spin-polarized current-driven magnetization switching
- Current induced torques and interfacial spin-orbit coupling: Semiclassical Modeling
- Relativistic Neel-order fields induced by electrical current in antiferromagnets
- Finite-element theory of transport in ferromagnet-normal metal systems
- Spin current and polarization in impure 2D electron systems with spin-orbit coupling
- Spin pumping and spin-transfer torques in antiferromagnets
- Non-collinear Magnetoelectronics
- Fractional spinon excitations in the quantum Heisenberg antiferromagnetic chain
- Spin transfer and current-induced switching in antiferromagnets
- Diffusive spin dynamics in ferromagnetic thin films with a Rashba interaction
- Spin-transport in multi-terminal normal metal - ferromagnet systems with non-collinear magnetizations
- Interface enhancement of Gilbert damping from first-principles
- Superfluid spin transport through antiferromagnetic insulators
- Spin-orbit torques in locally and globally non-centrosymmetric crystals: Antiferromagnets and ferromagnets
- Spin transfer in an antiferromagnet
- Quantum and classical criticality in a dimerized quantum antiferromagnet
- Spin-transfer torques in anti-ferromagnetic metals from first principles
- Effect of Polarized Current on the Magnetic State of Antiferromagnet
- Current-induced torques due to compensated antiferromagnets
- Ab-initio GMR and current-induced torques in Au/Cr multilayers
- Current induced torques in structures with ultra-thin IrMn antiferromagnet
- Electron Dynamics in Slowly Varying Antiferromagnetic Texture
- A unified drift-diffusion theory for transverse spin currents in spin valves, domain walls and other textured magnets
- Spin Hall effects in diffusive normal metals
- Spin Transfer Torque in Antiferromagnetic Spin-Valves: From Clean to Disordered Regimes
- Theory of coupled spin-charge transport due to spin-orbit interaction in inhomogeneous two-dimensional electron liquids
- Inelastic scattering in ferromagnetic and antiferromagnetic metal spintronics
- Spin-orbit coupled transport and spin torque in a ferromagnetic heterostructure
- Hybrid skew scattering regime of the anomalous Hall effect in Rashba systems: unifying Keldysh, Boltzmann, and Kubo formalisms
Cited by in corpus (25)
- Antiferromagnetic spintronics
- Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
- Spin-polarized current in non-collinear antiferromagnets
- Néel Spin Currents in Antiferromagnets
- Antiferromagnetic Tunnel Junctions for Spintronics
- Dephasing of Transverse Spin Current in Ferrimagnetic Alloys
- Boris Computational Spintronics -- High Performance Multi-Mesh Magnetic and Spin Transport Modelling Software
- Robust spin-transfer torque and magnetoresistance in non-collinear antiferromagnetic junctions
- Microscopic Origin of Spin-Orbit Torque in Ferromagnetic Heterostructures: A First Principles Approach
- Current-induced magnetization switching of exchange-biased NiO heterostructures characterized by spin-orbit torque
- Intrinsic staggered spin-orbit torque for the electrical control of antiferromagnets -- application to CrI
- Non-classical spin transfer effects in an antiferromagnet
- Non-equilibrium spin density and spin-orbit torque in three dimensional topological insulators - antiferromagnet heterostructure
- Quasiclassical theory for antiferromagnetic metals
- Spin-orbit torques in a Rashba honeycomb antiferromagnet
- Spin decoherence independent of antiferromagnetic order in IrMn
- Microscopic Calculation of Spin Torques in Textured Antiferromagnets
- Spin-neutral currents for spintronics
- Nonequilibrium magnons from hot electrons in antiferromagnetic systems
- Geometric Dynamics of Magnetization: Electronic Contribution
- Giant anisotropy of Gilbert damping in a Rashba honeycomb antiferromagnet
- Topological spin Hall effect in antiferromagnets driven by vector Néel chirality
- Spin transfer torques and spin-dependent transport in a metallic F/AF/N tunneling junction
- First-principles calculations of spin-orbit torques in MnAu/heavy-metal bilayers
- New perspective on symmetry breaking in a clean antiferromagnetic chain: Spin-selective transport and NDR phenomenon