biostudies-literatureYang KNational Science Foundation (NSF)National Science Foundation2670https://www.ebi.ac.uk/biostudies/studies/S-EPMC11258263biostudies-literatureUnknown15(1)The presence of topological flat minibands in moiré materials provides an opportunity to explore the interplay between topology and correlation. In this work, we study moiré minibands in topological insulator films with two hybridized surface states under a moiré superlattice potential created by two-dimensional insulating materials. We show the lowest conduction (highest valence) Kramers' pair of minibands can be Z2 non-trivial when the minima (maxima) of moiré potential approximately form a hexagonal lattice with six-fold rotation symmetry. Coulomb interaction can drive the non-trivial Kramers' minibands into the quantum anomalous Hall state when they are half-filled, which is further stabilized by applying external gate voltages to break inversion. We propose the monolayer Sb<sub>2</subNature communicationsTopological minibands and interaction driven quantum anomalous Hall state in topological insulator based moire heterostructures.PMC11258263DMR-2011839Schindler FLiu CXBernevig BAYang KFeng YTang PXu ZBi ZXu YfalseTopological minibands and interaction driven quantum anomalous Hall state in topological insulator based moire heterostructures.The presence of topological flat minibands in moiré materials provides an opportunity to explore the interplay between topology and correlation. In this work, we study moiré minibands in topological insulator films with two hybridized surface states under a moiré superlattice potential created by two-dimensional insulating materials. We show the lowest conduction (highest valence) Kramers' pair of minibands can be Z2 non-trivial when the minima (maxima) of moiré potential approximately form a hexagonal lattice with six-fold rotation symmetry. Coulomb interaction can drive the non-trivial Kramers' minibands into the quantum anomalous Hall state when they are half-filled, which is further stabilized by applying external gate voltages to break inversion. We propose the monolayer Sb<sub>2</sub2024-01-01T00:00:00Z2024 Mar2025-04-18T13:10:53.662Z2025-04-06T22:43:22.793ZS-EPMC112582633853187910.1038/s41467-024-46717-7