Spin pumping from antiferromagnetic insulator spin-orbit-proximitized by adjacent heavy metal: A first-principles Floquet-nonequilibrium Green's function study
arXiv:2109.15249 · doi:10.1088/2515-7639/ac6ae6
Abstract
Motivated by recent experiments [P. Vaidya {\em et al.}, Science {\bf 368}, 160 (2020)] on spin pumping from sub-THz radiation-driven uniaxial antiferromagnetic insulator (AFI) MnF into heavy metal (HM) Pt hosting strong spin-orbit (SO) coupling, we compute and compare pumped spin currents in Cu/MnF/Cu and Pt/MnF/Cu heterostructures. Recent theories of spin pumping by AFI have relied on simplistic Hamiltonians (such as tight-binding) and the scattering approach to quantum transport yielding the so-called interfacial spin mixing conductance (SMC), but the concept of SMC ceases to be applicable when SO coupling is present directly at the interface. In contrast, we use more general first-principles quantum transport approach which combines noncollinear density functional theory with Floquet-nonequilibrium Green's functions in order to take into account: {\em SO-proximitized AFI} as a new type of quantum material, different from isolated AFI and brought about by AFI hybridization with adjacent HM layer; SO coupling at interfaces; and evanescent wavefunctions penetrating from Pt or Cu into AFI layer to make its interfacial region {\em conducting} rather than insulating as in the original AFI. The DC component of pumped spin current vs. precession cone angle $θ_{\vb*{l}}$ of the Néel vector $\vb*{l}$ of AFI {\em does not} follow putative $I^{S_z}_\mathrm{DC} \propto \sin^2 θ_{\vb*{l}}$, except for very small angles $θ_{\vb*{l}} \lesssim 10^\circ$ for which we can define an {\em effective} SMC from the prefactor and find that it doubles from MnF/Cu to MnF/Pt interface. In addition, the angular dependence $I^{S_z}_\mathrm{DC}(θ_{\vb*{l}})$ differs for opposite directions of precession of the Néel vector, leading to twice as large SMC for the right-handed than for the left-handed chirality of the precession mode.
arXiv comment10 pages, 4 figures. J. Phys. Mater
References in corpus (47)
- Antiferromagnetic spintronics
- Antiferromagnetic spintronics
- QuantumATK: An integrated platform of electronic and atomic-scale modelling tools
- Nonlocal magnetization dynamics in ferromagnetic heterostructures
- Optimization Algorithm for the Generation of ONCV Pseudopotentials
- Transport properties of non-equilibrium systems under the application of light: Photo-induced quantum Hall insulators without Landau levels
- Floquet Engineering of Quantum Materials
- Scattering approach to parametric pumping
- Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic Interfaces
- An Adiabatic Quantum Electron Pump
- Spin pumping and spin-transfer torques in antiferromagnets
- Creating stable Floquet-Weyl semimetals by laser-driving of 3D Dirac materials
- Subterahertz spin pumping from an insulating antiferromagnet
- Spin Torques in Ferromagnetic/Normal Metal Structures
- First-principles study of magnetization relaxation enhancement and spin-transfer in thin magnetic films
- Interface enhancement of Gilbert damping from first-principles
- Effective spin-mixing conductance of heavy-metal-ferromagnet interfaces
- Dictionary between scattering matrix and Keldysh formalisms for quantum transport driven by time-periodic fields
- Mono-parametric quantum charge pumping: interplay between spatial interference and photon-assisted tunneling
- Charge Pumping and Photovoltaic effect in Open Quantum Dots
- Numerical simulations of time resolved quantum electronics
- Spin currents and spin dynamics in time-dependent density-functional theory
- Effective gauge field theory of spintronics
- 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
- Proximity band structure and spin textures on both sides of topological-insulator/ferromagnetic-metal interface and their transport probes
- Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets
- Calculating the transport properties of magnetic materials from first-principles including thermal and alloy disorder, non-collinearity and spin-orbit coupling
- Transverse spin gradient functional for non-collinear spin density functional theory
- Theory of spin loss at metallic interfaces
- Spin Pumping and Inverse Spin Hall Voltages from Dynamical Antiferromagnets
- Non-adiabatic charge pump: an exact solution
- Spin and charge pumping by steady or pulse current-driven magnetic domain wall: A self-consistent multiscale time-dependent-quantum/time-dependent-classical approach
- Spin and charge pumping in magnetic tunnel junctions with precessing magnetization: A nonequilibrium Green function approach
- Mode-Dependent Damping in Metallic Antiferromagnets Due to Inter-Sublattice Spin Pumping
- Spatio-temporal dynamics of shift current quantum pumping by femtosecond light pulse
- Charge pumping by magnetization dynamics in magnetic and semi-magnetic tunnel junctions with interfacial Rashba or bulk extrinsic spin-orbit couplings
- Spin-to-charge conversion in lateral and vertical topological-insulator/ferromagnet heterostructures with microwave-driven precessing magnetization
- Spin-orbit-proximitized ferromagnetic metal by monolayer transition metal dichalcogenide: Atlas of spectral functions, spin textures and spin-orbit torques in Co/MoSe, Co/WSe and Co/TaSe heterostructures
- Electronic structure and magnetic anisotropies of antiferromagnetic transition-metal difluorides
- Magnon-driven chiral charge and spin pumping and electron-magnon scattering from time-dependent quantum transport combined with atomistic spin dynamics theory
- Numerical cookbook for electronic quantum transport at finite frequency
- Effective spin-mixing conductance of topological-insulator/ferromagnet and heavy-metal/ferromagnet spin-orbit-coupled interfaces: A first-principles Floquet-nonequilibrium-Green-function approach
- Recent progress in antiferromagnetic dynamics
- Periodicity of the time-dependent Kohn-Sham equation and the Floquet theorem
- High-harmonic generation in spin and charge current pumping at ferromagnetic or antiferromagnetic resonance in the presence of spin-orbit coupling
- A microscopic formulation of dynamical spin injection in ferromagnetic-nonmagnetic heterostructures
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