Light Emitting Diodes of Inverse Spin Valves

摘要

Light emitting diodes made out of inverse spin valves of a ferromagnetic half metalsandwiched between two nonmagnetic metals are proposed. Based on a giant spin-dependentchemical potential difference created under an external bias, the inverse spin valves are possible to emit light when electrons with the higher chemical potential flip their spins and become the electrons of the opposite spin with the lower chemical potential. The frequency of this type of light emitting diodes is tunable bythe bias.