Electrical spin filtering the key to ultra-fast, energy-efficient spintronics

Science Daily  December 4, 2020
All-electrical generation of spin has already been successfully demonstrated. However, detection of spin-to-charge conversion has always required a large range of magnetic fields, thus limiting the speed and practicality. An international team of researchers (Australia, Switzerland, Japan, Slovenia, UK, Singapore) introduces a new method for detecting spin accumulation using a spin filter, which separates different spin orientations based on their energies. They demonstrated a general method that exploits the nonlinear interactions between spin and charge currents to perform all-electrical, rapid, and noninvasive detection of spin accumulation without the need for a magnetic field. They used this technique with ballistic GaAs holes as a model system with strong spin-orbit coupling, in which a quantum point contact provides the nonlinear energy filter. Spin-filtering could be the key to faster, more energy-efficient switching in future spintronic technology…read more. TECHNICAL ARTICLE 

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