Origin of Magic Angles in Twisted Bilayer Graphene
Origin of Magic Angles in Twisted Bilayer Graphene
Twisted Bilayer graphene (TBG) is known to feature isolated and relatively flat bands near charge neutrality, when tuned to special magic angles. However, different criteria for the magic angle such as the vanishing of Dirac speed, minimal bandwidth or maximal band gap to higher bands typically give different results. Here …