Strongly Correlated Chern Insulators in Magic-Angle Twisted Bilayer Graphene

Understand

Interactions among electrons and the topology of their energy bands can create novel quantum phases of matter.

• Most topological electronic phases appear in systems with weak electron-electron interactions.
• The instances where topological phases emerge only as a result of strong interactions are rare, and mostly limited to those realized in the presence of intense magnetic fields.
• The discovery of flat electronic bands with topological character in magic-angle twisted bilayer graphene (MATBG) has created a unique opportunity to search for new strongly correlated topological phases.