Moiré superlattices Neutral bosons Layered approach: both teams created excitonic insulators by twisting the relative orientations of thin sheets in layered materials. (Courtesy: Shutterstock/Mopic) Excitonic insulators – an exotic type of matter with a ground state comprising bound electron–hole pairs – have been made by two independent research groups. ...
View more: Excitonic insulators are created in moiré superlattices