A scanning tunneling study of twisted bilayer graphene at the first magic angle*

Recently, bilayer graphene with small twist angle has been shown to be a valuable platform for correlated electron phenomena. Band structure calculations show that at certain twist angle values, labelled magic angles, the lowest band has a flat energy-momentum dispersion. Transport experiments find evidence for a correlated insulating phase when this flat band is exactly half filled. Furthermore, a small doping level away from half filling gives rise to a superconducting instability. In this talk, we will discuss how a scanning tunneling microscope can help to elucidate the electronic properties of twisted bilayer graphene close to the first magic angle.