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Efficient Magnon Injection and Detection via the Orbital Rashba-Edelstein Effect
J A Mendoza-Rodarte1,2, M Cosset-Chéneau1, B J van Wees1
1Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands.
Physical Review Letters
|June 15, 2024
Summary
Orbital angular momentum enhances spintronic effects by boosting magnon spin injection and detection in nanodevices. Researchers observed different efficiencies for injection and detection, highlighting disparities in orbital Rashba-Edelstein effects.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Spintronics offers advanced functionalities by utilizing electron spin.
- Controlling spin through orbital angular momentum is an emerging research area.
- Nanodevices require efficient methods for spin manipulation.
Purpose of the Study:
- To investigate the role of orbital currents and accumulation in enhancing spintronic effects.
- To demonstrate increased magnon spin injection and detection efficiencies using interconversion effects.
- To analyze the disparity between direct and inverse orbital Rashba-Edelstein effects.
Main Methods:
- Fabrication of nanodevices with magnetic insulators and Pt/CuO_{x} electrodes.
- Utilizing interconversion effects between charge current and orbital angular momentum.
- Measuring and comparing magnon spin injection and detection efficiencies.
Main Results:
- Achieved a dramatic increase in magnon spin injection efficiency.
- Observed a significant enhancement in magnon spin detection efficiency.
- Identified distinct variations in efficiency, indicating unequal direct and inverse orbital Rashba-Edelstein effects.
Conclusions:
- Orbital currents and accumulation are effective strategies for boosting spintronic performance.
- The observed efficiency variations highlight the asymmetric nature of the orbital Rashba-Edelstein effect in these systems.
- This work opens new pathways for designing highly efficient spintronic nanodevices.
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