Current-driven spin orbit field in LaAlO3/SrTiO3 heterostructures

摘要

We demonstrate a current tunable Rashba spin orbit interaction in LaAlO/SrTiO (LAO/STO) quasi two dimensional electron gas system. Anisotropic magnetoresistance measurements are employed to detect and understand the current-induced Rashba field. The effective Rashba field scales with the current and a value of 2.35 T is observed for a dc-current of 200 μA. The results suggest that LAO/STO heterostructures can be considered for spin orbit torque based magnetization switching.