First principles calculation and experimental study of the self spin pumping in La_0.67Sr_0.33MnO₃

In spintronics research, the efficient generation of spin currents and spin torques is an important subject and the spin Hall effect is one of the most important mechanisms to generate spin currents in spintronic devices. Recently, experiments have shown that anti-damping spin torques and the inverse spin Hall effect occur simultaneously in the La_0.67Sr_0.33MnO₃ (LSMO)/Pt heterostructures [1]. In this talk, we discuss theoretical calculations and experimental measurements of the inverse spin Hall effect (ISHE) in single layer LSMO films. In order to evaluate the appreciable ISHE from the experiment, we compute the spin Hall conductivity of bulk LSMO using first principles calculations. First, the ground state electronic structure of bulk LSMO is obtained from density functional theory. Next, we interpolate the calculated electronic structure into the orbital-based Wannier functions basis. Finally, using the Kubo formalism, we compute the full spin Hall conductivity tensor of bulk LSMO. The calculated spin Hall conductivity values for bulk LSMO are on the order of 10 S/cm, in reasonable agreement with the experimental results.