High temperature spin Hall effect in topological insulator

Applications of spin–orbit torque (SOT) spintronic devices to automobile or space vehicles require a spin Hall material with high performance at temperature (>120 °C). However, the effect has been studied so far in many materials mostly from cryogenic room temperature. Here, we BiSb topological insulator up 125 °C. Although effective angle θSHeff monotonically decreases increasing temperature, maintains large 4.9 even °C, demonstrating capability for applications. Furthermore, temperature-dependence conductivity indicates that surface states are origin giant BiSb.