Control of Nonlocal Magnon Spin Transport via Magnon Drift Currents
Entity
UAM. Departamento de Física Teórica de la Materia CondensadaPublisher
American Physical SocietyDate
2021-06-23Citation
10.1103/PhysRevLett.126.257201
Physical Review Letters 126.25 (2021): 257201
ISSN
0031-9007 (print); 1079-7114 (online)DOI
10.1103/PhysRevLett.126.257201Editor's Version
https://doi.org/10.1103/PhysRevLett.126.257201Subjects
Asymmetric Interaction; Drift Velocities; Dzyaloshinskii-Moriya Interaction; Electric Force; Electrical Injection; Magnetic Insulator; Propagation Lengths; Spin Transport Theories; FísicaRights
© 2021 American Physical SocietyAbstract
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 Letter, we demonstrate the controlled generation of magnon drift currents in heterostructures of yttrium iron garnet and platinum. 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
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Google Scholar:Schlitz, Richard
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Vélez, Saül
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Kamra, Akashdeep
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Lambert, Charles-Henri
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Lammel, Michaela
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Goennenwein, Sebastian T. B.
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Gambardella, Pietro
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