This project aims to understand the behavior of spin in strong spin-orbit coupling (SOC) low-dimensional materials. We are studying monolayer WSe₂, a transition metal dichalcogenide, which has a coupled spin and valley Hall effect, and puckered Bismuth Antimony, which is a topological insulator (TI) with spin-polarized edge states. We use electric and magnetic fields to control the spin current in these materials. We are analyzing the spin behavior using the magneto-optical Kerr effect. Our results will lead to new ways to generate spin current for computing applications using magnetic materials.