Control of nonlocal magnon spin transport via magnon drift currents

Abstract

Spin transport via magnon diffusion in magnetic insulators is important for a broad range of spin-based phenomena and devices. However, the absence of the magnon equivalent of an electric force is a bottleneck. In this work, we demonstrate the controlled generation of magnon drift currents in yttrium iron garnet/platinum heterostructures. By performing electrical injection and detection of incoherent magnons, we find magnon drift currents that stem from the interfacial Dzyaloshinskii-Moriya interaction. We can further control the magnon drift by the orientation of the magnetic field. The drift current changes the magnon propagation length by up to $\pm$ 6 % relative to diffusion. We generalize the magnonic spin transport theory to include a finite drift velocity resulting from any inversion asymmetric interaction, and obtain results consistent with our experiments.

arXiv comment6 pages, 3 figures

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• Electromagnetic Proximity Effect: Superconducting Magnonics and Beyond
• Acousto-magnonic spin Hall effect in honeycomb antiferromagnets
• Magnon currents excited by the spin Seebeck effect in ferromagnetic EuS thin films
• Evidence of Strong Dzyaloshinskii-Moriya Interaction at the Cobalt/Hexagonal Boron Nitride Interface
• Magnonic spin Joule heating and rectification effects
• Shock-wave-like emission of spin waves induced by interfacial Dzyaloshinskii-Moriya interaction
• Finite-frequency spin conductance of a ferro-/ferrimagnetic-insulator|normal-metal interface
• Electrical Seebeck-Contrast Observation of Magnon Hall Effect in Topological Ferromagnet Lu${}_2$V${}_2$O${}_7$/Heavy Metal Heterostructures
• Nonreciprocal magnons in layered antiferromagnets VPX3(X =S,Se,Te)
• Anisotropic Magnon Spin Transport in Ultra-thin Spinel Ferrite Thin Films -- Evidence for Anisotropy in Exchange Stiffness
• Theory of nonlinear magnetoelectric transport effects in normal-metal $-$ magnetic-insulator heterostructures
• Magnon-mediated electric current drag and nonlocal spin-Peltier effect in the ac regime
• Observation of Dyakonov-Perel-type magnon spin relaxation in uniaxial antiferromagnetic insulators
• Nonreciprocal Magnon Hanle Effect in Antiferromagnetic $\alpha$-Fe${}_2$O${}_3$
• Using superconductivity to control magnetism: a facet of superconducting spintronics
• Theory of drift-enabled control in nonlocal magnon transport