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Proposal for Unambiguous Electrical Detection of Spin-Charge Conversion in Lateral Spin Valves
Stuart A Cavill1, Chunli Huang2,3, Manuel Offidani1
1Department of Physics, University of York, YO10 5DD York, United Kingdom.
Physical Review Letters
|July 1, 2020
Summary
We developed a new electrical method to detect spin-charge conversion in nanostructures. This technique disentangles spin-orbit coupling effects like the inverse spin Hall effect and spin galvanic effect.
Area of Science:
- Condensed matter physics
- Spintronics
- Nanotechnology
Background:
- Spin-charge conversion is key to understanding spin-orbit-coupled nanostructures.
- Existing methods struggle to separate competing spin-orbit coupling (SOC) phenomena.
Purpose of the Study:
- To demonstrate a novel electrical detection scheme for spin-charge conversion.
- To enable the disentanglement of inverse spin Hall and spin galvanic effects.
Main Methods:
- Utilizing a specific device geometry under an oblique magnetic field.
- Employing symmetry analysis of nonlocal resistance measurements.
- Probing spin-charge conversion in diffusive lateral channels.
Main Results:
- The proposed scheme successfully disentangles competing SOC transport phenomena.
- Direct access to SOC transport coefficients is achieved.
- The method is robust against variations in spin-injector magnetization and disorder.
Conclusions:
- This electrical detection scheme offers a robust method for studying spin-charge conversion.
- It is applicable to both spin-valve and hybrid optospintronic devices.
- The technique advances the understanding of emergent phenomena in nanostructures.
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