Magic angle twisted bilayer graphene: strong correlations and Landau level

The electronic structure of twisted bilayer graphene (TBLG) features a peculiar Fermi velocity renormalization property which leads to vanishing Fermi-velocities near neutrality at certain "magic" twist angles. At the magic angle the system has strong correlations which have been shown experimentally to lead to Mott insulator and superconducting phases. I will discuss the Landau level structure of TBLG near magic angles, the relationship between electronic structure and experimentally observed Landau levels, and the relationship between magic angle behavior and the system's response to external magnetic fields. We show that the Landau level structure near neutrality is highly sensitive to self-energy modifications of magic angle electronic structure.