The emergence of high-transition-temperature (Tc) superconductivity in strongly correlated materials remains the main unsolved problem in physics. High-Tc 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-Tc materials1-5, obtaining accurate solutions of the model, especially in the relevant regime of moderate correlation, is challenging6. The recent demonstration of robust superconductivity in moiré WSe2 (refs. 7,8), in which low-energy electronic bands can be described by the Hubbard model and are highly tunable9-11, presents a new platform for studying the high-Tc problem. Here we tune moiré WSe2 bilayers to the moderate correlation regime through the twist angle and map the phase diagram around one hole per moiré unit cell (ν = 1) by electrostatic gating and electrical transport and magneto-optical measurements. We observe a range of high-Tc phenomenology, including an antiferromagnetic insulator at ν = 1, superconducting domes on electron and hole doping, and unusual metallic states such as strange metals12-14. Twist-angle dependence studies further show that the highest Tc always occurs adjacent to the Mott transition3,15. Our results indicate strong correlation as the key to superconductivity in moiré WSe2 and establish a new material system for studying high-Tc superconductivity in a controllable manner.
Xia et al. (Wed,) studied this question.