Researchers from the University of New South Wales (UNSW) demonstrated spin detection using a spin filter to separate spin orientation according to their energies.

UNSW electrical spin filtering technique image

In this new study, UNSW researchers have exploited the non-linear interactions between spin accumulation and charge currents in gallium-arsenide holes, demonstrating all-electrical spin-to-charge conversion without the need for a magnetic field. This is an important achievement for spintronics devices, as detection of spin-to-charge conversion has always required a large range of magnetic fields, thus limiting the speed and practicality.