Superconductivity has been observed in moiré systems such as twisted bilayer graphene,
which host flat, dispersionless electronic bands. In parallel, theory work has discovered that …

When single layers of 2D materials are stacked on top of one another with a small twist in
orientation, the resulting structure often involves incommensurate moiré patterns. In these …

Materials with flat electronic bands often exhibit exotic quantum phenomena owing to strong
correlations. An isolated low-energy flat band can be induced in bilayer graphene by simply …

The production of large-area twisted bilayer graphene (TBG) with controllable angles is a
prerequisite for proceeding with its massive applications. However, most of the prevailing …

We develop an effective extended Hubbard model to describe the low-energy electronic
properties of the twisted bilayer graphene. By using the Bloch states in the effective …

We show that the electronic structure of the low-energy bands in the small angle-twisted
bilayer graphene consists of a series of semimetallic and topological phases. In particular …

We use self-consistent Hartree-Fock calculations performed in the full π-band Hilbert space
to assess the nature of the recently discovered correlated insulator states in magic-angle …

We show that the Wannier obstruction and the fragile topology of the nearly flat bands in
twisted bilayer graphene at magic angle are manifestations of the nontrivial topology of two …

We study the electron-phonon coupling in twisted bilayer graphene (TBG), which was
recently experimentally observed to exhibit superconductivity around the magic twist angle …

We build symmetry-adapted maximally localized Wannier states and construct the low-
energy tight-binding model for the four narrow bands of twisted bilayer graphene. We do so …