Spin pumping and shot noise in ferrimagnets: bridging ferro- and antiferromagnets

Abstract

A combination of novel technological and fundamental physics prospects has sparked a huge interest in pure spin transport in magnets, starting with ferromagnets and spreading to antiferro- and ferrimagnets. We present a theoretical study of spin transport across a ferrimagnet$|$non-magnetic conductor interface, when a magnetic eigenmode is driven into a coherent state. The obtained spin current expression includes intra- as well as cross-sublattice terms, both of which are essential for a quantitative understanding of spin-pumping. The dc current is found to be sensitive to the asymmetry in interfacial coupling between the two sublattice magnetizations and the mobile electrons, especially for antiferromagnets. We further find that the concomitant shot noise provides a useful tool for probing the quasiparticle spin and interfacial coupling.

arXiv comment4 pages + supplementary material

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Cited by in corpus (48)

• Quantum magnonics: when magnon spintronics meets quantum information science
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• Spin Insulatronics
• Antiferromagnetic magnons as highly squeezed Fock states underlying quantum correlations
• Gilbert damping phenomenology for two-sublattice magnets
• Noninteger-spin magnonic excitations in untextured magnets
• Enhancement of superconductivity mediated by antiferromagnetic squeezed magnons
• Antiferromagnetic cavity optomagnonics
• Mode-Dependent Damping in Metallic Antiferromagnets Due to Inter-Sublattice Spin Pumping
• Spin splitting induced in a superconductor by an antiferromagnetic insulator
• Proper dissipative torques in antiferromagnetic dynamics
• Spin pumping in an altermagnet/normal metal bilayer
• Magnon-mediated superconductivity on the surface of a topological insulator
• Finite temperature magnon spectra in yttrium iron garnet from mean field approach in tight-binding model
• Magnon-Mediated Indirect Exciton Condensation through Antiferromagnetic Insulators
• Theory of quantum entanglement and the structure of two-mode squeezed antiferromagnetic magnon vacuum
• Spin pumping at terahertz nutation resonances
• Magnon decay theory of Gilbert damping in metallic antiferromagnets
• Interfacial Spin Seebeck effect in noncollinear magnetic systems
• Spin structure and spin Hall magnetoresistance of epitaxial thin films of the insulating non-collinear antiferromagnet SmFeO${}_3$
• Generation of spin-triplet Cooper pairs via a canted antiferromagnet
• Cross-sublattice Spin Pumping and Magnon Level Attraction in van der Waals Antiferromagnets
• Recent progress in antiferromagnetic dynamics
• An insulating doped antiferromagnet with low magnetic symmetry as a room temperature spin conduit
• Manipulating Ferrimagnets by Fields and Currents
• Absence of cross-sublattice spin pumping and spin-transfer torques in collinear antiferromagnets
• Spin transfer and spin pumping in disordered normal metal-antiferromagnetic insulator systems
• Quantum Sensing of Antiferromagnetic Magnon Two-Mode Squeezed Vacuum
• Noise in tunneling spin current across coupled quantum spin chains
• Spin pumping in noncollinear antiferromagnets
• Schwinger boson study of superconductivity mediated by antiferromagnetic spin-fluctuations
• Thermally induced spin torque and domain wall motion in superconductor/antiferromagnetic insulator bilayers
• Quantum Scattering Theory of Spin Transfer Torque, Spin Pumping and Fluctuations
• Magnon drag in a metal-insulating antiferromagnet bilayer
• Spin-pumping in superconductor-antiferromagnetic insulator bilayers
• Spin-torque-induced magnetization dynamics in ferrimagnets based on Landau-Lifshitz-Bloch Equation
• Unified formulation of interfacial magnonic pumping from non-collinear magnets
• Photoinduced non-reciprocal magnetism
• Renormalization of antiferromagnetic magnons by superconducting condensate and quasiparticles
• Spin pumping from antiferromagnetic insulator spin-orbit-proximitized by adjacent heavy metal: A first-principles Floquet-nonequilibrium Green's function study
• Voltage-Controlled High-Bandwidth Terahertz Oscillators Based On Antiferromagnets
• Shot noise of charge and spin transport in a junction with a precessing molecular spin
• Diverging entanglement of critical magnons in easy-axis antiferromagnets
• Spin Seebeck effect in two-sublattice ferrimagnets in the vicinity of $T_{\mathrm{C}}$
• Coherent Spin Pumping Originated from Sub-Terahertz Néel Vector Dynamics in Easy Plane α-Fe2O3/Pt
• Breaking of Coulomb blockade by macrospin-assisted tunneling
• Quantum Theory of Spin-Transfer and Spin-Pumping in Collinear Antiferromagnets and Ferrimagnets
• Squeezing and quantum control of antiferromagnetic magnon pseudospin