Fractional topological phases and superconductivity in twisted MoTe₂

Two-dimensional moiré systems provide an exceptional platform for exploring novel quantum phenomena arising from the interplay between strong electronic correlations and nontrivial band topology. A notable example is the recent experimental observation of fractional quantum anomalous Hall effects in moiré Chern bands. This discovery opens new avenues for investigating a wide range of many-body quantum phases in lattice systems without external magnetic fields. In this talk, I will present our recent transport studies of high-quality twisted bilayer MoTe₂ devices. In particular, we reveal a subtle competition among fractional Chern insulators, superconductivity, reentrant quantum anomalous Hall solids, and other interaction-driven quantum states. We further uncover a unified twist-angle–driven phase evolution that links fractional topology, symmetry breaking, magnetic order, and superconductivity, providing new insights into the emergent quantum phenomena in moiré materials.