Bandwidth-tuned Mott transition and superconductivity in moiré WSe2

Abstract The emergence of high-transition-temperature ( T c ) superconductivity in strongly correlated materials remains the main unsolved problem in physics. High- T c materials, such as cuprates, are generally complex and not easily tunable, making theoretical modelling difficult. Although the Hubbard model—a simple theoretical model of interacting electrons on a lattice—is believed to capture the essential physics of high- T c materials 1–5 , obtaining accurate solutions of the model, especially in the relevant regime of moderate correlation, is challenging 6 . The recent demonstration of robust superconductivity in moiré WSe 2 (refs. 7,8 ), in which low-energy electronic bands can be described by the…