Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
When two sheets of graphene are stacked at a small twist angle, the resulting flat superlattice minibands are expected to strongly enhance electron-electron interactions. Here we present evidence that near three-quarters ($3/4$) filling of the conduction miniband these enhanced interactions drive the twisted bilayer graphene into a ferromagnetic state. We …