Fabrication and measurement procedures for magic angle graphene devices*

Understanding the behavior of strongly correlated materials, such as unconventional superconductors, has been a challenge for decades. Graphene has turned out to be a new platform to study these phenomena. In particular, we have observed unconventional superconductivity and correlated insulating states by stacking two graphene layers and twisting them at a small angle, of about 1.1°. In this talk, we will focus on the fabrication procedures leading to reproducibly achieving high quality and low disorder ‘magic angle’ twisted bilayer graphene devices, with maximum critical temperatures over 2K and critical fields over 100mT. Such achievements with graphene further contribute to an emerging field, commonly referred to as ‘twistronics’, where other 2d –materials can be twisted to give rise to new correlated systems.