Twist-angle in moiré lattice controls valley polarization switching in heterostructures

In a study published in Science Advances, Prof. Wang Can from the Institute of Physics of the Chinese Academy of Sciences and Prof. Xu Xiulai of Peking University have demonstrated for the first time the dependence of valley polarization switching and polarization degree on the moiré period by twist engineering in electrically controlled transition metal dichalcogenide heterobilayers (hBLs).