Control of nonlocal magnon spin transport via magnon drift currents
arXiv:2106.12946 · doi:10.1103/PhysRevLett.126.257201
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 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.
6 pages, 3 figures
References in corpus (9)
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Direct electronic measurement of the spin Hall effect
- Magnon Polarons in the Spin Seebeck Effect
- Superfluid spin transport through antiferromagnetic insulators
- Magnon Mediated Electric Current Drag Across a Ferromagnetic Insulator Layer
- Spin convertance at magnetic interfaces
- Chiral spin-wave velocities induced by all-garnet interfacial Dzyaloshinskii-Moriya interaction in ultrathin yttrium iron garnet films
- Magnonics: Spin Waves Connecting Charges, Spins and Photons
- Focused ion beam modification of non-local magnon-based transport in yttrium iron garnet/platinum heterostructures