February 2017

Researchers from the Tokyo Institute of Technology managed to achieve an almost purely circularly polarized (CP) electroluminescence (EL) in spin-polarized LEDs at room temperature without an external magnetic field.

The researchers used LEDs and a polycrystalline Fe in-plane spin injector. During the experiment the researchers injected spins of a given type, which were dispersed due to spin relaxation. Radiative recombination subsequently occurred, which was observed in the form of a linearly polarized emission. Almost pure circularly polarized emission was achieved when the current density was high enough.

Professor Stuart parkin, the director of the Max Planck Institute of Microstructure Physics in Halle/Salle, Germany and a Professor at the Institute of Physics of the Martin-Luther-University Halle-Wittenberg explains his spintronics research, and how can spintronic devices be built to improve computing capacity.