Charge-to-spin interconversion at (111) oxide interfaces

In the field of spin-orbitronics, the intrinsic spin-orbit coupling (SOC) of materials is exploited to convert spin to charge and viceversa. The Edelstein effect is a peculiar spin-orbitronic phenomenon, typical of two-dimensional (2D) systems with SOC and broken inversion symmetry, where a magnetization is produced in response to an electric field. A natural platform to exhibit this feature are two-dimensional electron gases at oxide interfaces. Here we predict an Edelstein response at (111) LaAlO3/SrTiO3 interface, discussing in detail the differences with the canonical Edelstein effect in a simple isotropic Rashba model. We predict a tunable spin and orbital magnetization, commenting on the possibility of disentangling the two in order to exploit them theoretically and practically.