Graphene and transition metal dichalcogenides (TMD) possess very different spin-dependent properties, so combining the two in a hybrid structure enables new type of behavior for spintronics. With low spin-orbit coupling, graphene is an excellent platform for spin injection, transport and relaxation. It has by far the longest spin diffusion length of any material at room temperature. In contrast, monolayer TMDs are a class of recently emergent 2D materials with unique spin/valley properties due to large spin-orbit coupling and Berry curvature. These materials are direct gap semiconductors with large spin/valley Hall angles and optical selection rules to create and detect spin/valley polarization. With TMD/graphene hybrid structures, we are exploring the fundamental spin transport and spin dynamics properties at 2D interfaces, and aim to demonstrate advanced device properties such as tunable spin field-effect transistors and spin-dependent optoelectronics.
| Science | Optical and Electrical … | Spin Transport in Graphene/TMD Hybrid Structures