Twisted bilayer graphene has a rich phase diagram, including superconductivity. Recently,
an unexpected discovery has been the observation of superconductivity in non-twisted …

The fractional quantum anomalous Hall effect (FQAHE), the analogue of the fractional
quantum Hall effect at zero magnetic field, is predicted to exist in topological flat bands …

Interactions among charge carriers in graphene can lead to the spontaneous breaking of
multiple degeneracies. When increasing the number of graphene layers following …

Studies of two-dimensional electron systems in a strong magnetic field revealed the
quantum Hall effect, a topological state of matter featuring a finite Chern number C and …

Understanding the mechanism of high-transition-temperature (high-T c) superconductivity is
a central problem in condensed matter physics. It is often speculated that high-T c …

The Mott insulator is a central concept in strongly correlated physics and manifests when the
repulsive Coulomb interaction between electrons dominates over their kinetic energy …

Electrons in topological flat bands can form new topological states driven by correlation
effects. The pentalayer rhombohedral graphene/hexagonal boron nitride (hBN) moiré …

Abstract Two-dimensional (2D) transition metal dichalcogenides (TMDs) have attracted
intense interests owing to their fascinating physical properties and potential applications. In …

Degeneracies in multilayer graphene, including spin, valley, and layer degrees of freedom,
can be lifted by Coulomb interactions, resulting in rich broken-symmetry states. Here, we …

Of the two stable forms of graphite, hexagonal and rhombohedral, the former is more
common and has been studied extensively. The latter is less stable, which has so far …