Twist-angle-dependent quantum phase diagrams in moiré bilayer MoTe₂

Two-dimensional semiconducting moiré superlattices provide a highly tunable platform for investigating strongly correlated and topological quantum phases^1-5. As a prototypical example, twisted bilayer MoTe₂ (tMoTe₂) has been shown to host fractional topological phases at zero magnetic field^6-20. However, their evolution with twist angle and competition with other correlated quantum states remain largely unexplored. Here we report a systematic transport study of twist-angle-dependent phase diagrams in tMoTe₂ across a range of 3.79°-5.76°, revealing an evolution from valley-polarized, fractional topological states to valley-degenerate correlated states and superconductivity. At relatively small twist angles, partially filled Chern bands of tMoTe₂ host fractional quantum anomalous Hall states following the Jain sequence, together with signatures of an anomalous composite Fermi liquid at moiré hole filling factor ν_h = 1/2. Increasing twist angle progressively suppresses fractional topological phases and reconstructs the half-filled Chern band into symmetry-breaking integer Chern insulating states. At ν_h = 1, we observe a transition from robust integer quantum anomalous Hall insulators at small angles to displacement-field-tuned, topologically trivial correlated insulators at larger angles. At twist angles above approximately 5.6°, superconductivity emerges adjacent to the ν_h = 1 correlated insulator, with a phase diagram closely resembling that recently reported in twisted bilayer WSe₂ (refs. ^21-24). Our results indicate a unified twist-angle-driven phase evolution linking fractional topology, symmetry breaking, magnetic order and superconductivity, providing new insight into the emergent quantum phenomena in moiré systems.