Origin of Mott Insulating Behavior and Superconductivity in Twisted Bilayer Graphene
Origin of Mott Insulating Behavior and Superconductivity in Twisted Bilayer Graphene
A remarkable recent experiment has observed Mott insulator and proximate superconductor phases in twisted bilayer graphene when electrons partly fill a nearly flat mini-band that arises a `magic' twist angle. However, the nature of the Mott insulator, origin of superconductivity and an effective low energy model remain to be determined. …