Figure 1 (IMAGE) Institute for Basic Science Caption Two different vdW heterostructures. The left consists of WS2 on top of WSe2, and the right consists of WSe2 on top of WS2. The two TMD layers are stacked on top of h-BN and Si/SiO2, which are substrates. Credit Institute for Basic Science Usage Restrictions Attribution Required License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.