Nearly flat Chern bands in moiré superlattices
2019; American Physical Society; Volume: 99; Issue: 7 Linguagem: Inglês
10.1103/physrevb.99.075127
ISSN2469-9977
AutoresYa-Hui Zhang, Dan Mao, Yuan Cao, Pablo Jarillo‐Herrero, T. Senthil,
Tópico(s)Advanced Operator Algebra Research
ResumoThe competition between the kinetic energy of electrons in a crystal and the inter-electron Coulomb repulsion underlies many fascinating phenomena in quantum materials. Superlattices formed from moir\'e patterns in graphene structures have emerged as tunable platforms for such physics. This paper shows that in many graphene moir\'e structures not only are the electronic bands narrow enough for Coulomb interaction to be important, but they are also topologically nontrivial. This setting of a strong correlated partially filled topological band promises to lead to many novel phenomena.
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