Probing charge-to-spin and spin-to-charge transduction in heterostructures of 2D van der Waals magnets

Heterostructures based on 2D van der Waals magnetic materials can provide clean interfaces with reliable transparencies for spin currents. This opens new avenues for improved spintronics devices with highly efficient spin-to-charge and charge-to-spin transduction. In this work, we probe the charge-to-spin conversion in heterostructures of 2D magnetic insulators with heavy metals. We quantitatively show that in the case of Cr₂Ge₂Te₆/Pt, the interface transparency for spin currents is similar to conventional 3D metallic-ferromagnet/Pt heterostructures but is much higher than for oxide-ferrimagnet/Pt interfaces. We also report measurements of spin-to-charge conversion in vdW heterostructures of 2D magnets with transition metal dichalcogenides, thereby revealing the microscopic nature of spin-orbit coupling in these systems.