Superconductivity in moiré WSe₂

The quest for a solid-state quantum simulator has long inspired condensed matter research, and recent progress in moiré materials has brought this vision closer to reality. By twisting two layers of atomically thin materials, one can create a highly tunable platform for exploring topological and strongly correlated quantum phenomena. Twisted WSe₂ (tWSe₂) has recently emerged as a new venue for band engineering in moiré semiconductors, where multiple control knobs—including twist angle, carrier density, displacement field, and magnetic field—enable precise manipulation of electronic correlations. This tunability has led to the first observation of superconductivity in a moiré semiconductor. In this talk, I will discuss how engineered moiré bands in tWSe₂ realize a triangular-lattice Hubbard model and give rise to unconventional superconductivity near a Mott transition at half-band filling. A closer examination reveals a rich phase diagram reminiscent of that in high-T_c superconductors. These findings may shed light on the longstanding mystery of high-T_c superconductivity and point toward future opportunities in solid-state quantum simulation.