Under a research project funded by the National Natural Science Foundation of China,Prof.He Lin,researcher of Beijing Normal University and colleagues obtained several interesting results on twisted graphene bilayers.Graphene placed on top of another graphene monolayer with stacking misorientation forms a unique two-dimensional van der Waals structure,i.e.,twisted graphene bilayer,in which the graphene-on-graphene moire gives rise to a periodic potential and therefore modifies the electronic spectra.This layered Under a research project funded by the National Natural Science Foundation of China, Prof. He Lin, researcher of Beijing Normal University and category. Several interesting results on twisted graphene bilayers. Graphene placed on top of another graphene monolayer with stacking misorientation forms a unique two -dimensional van der Waals structure, ie, twisted graphene bilayer, in which the graphene-on-graphene moire gives rise to a periodic potential and therefore modifies the electronic spectra.This layered