Moiré transition metal dichalcogenides have served as a versatile platform for simulating Hubbard physics. Recent experiments have identified robust superconductivity in moiré bilayer ${\mathrm{WSe}}_2$ for certain twist angles. Here, we propose the gossamer nature of the superconductivity recently discovered at half filling and zero displacement field in twisted ${\mathrm{WSe}}_2$. By mapping the moiré continuum system to an effective extended single-orbital Hubbard model on the triangular lattice, we employ renormalized mean-field theory to investigate the strong-coupling phase diagram. We find that a moderate Coulomb repulsion partially suppresses charge fluctuations while preserving a finite density of mobile doublons and holes. In this regime, the interplay between extended kinetic hoppings and antiferromagnetic superexchange stabilizes a chiral $d+id$ superconducting phase. Our results naturally account for the twist-angle-dependent evolution from a Mott insulator to a superconductor and eventually to a correlated metal. Furthermore, the model demonstrates that this half-filled pairing state vanishes rapidly upon density doping, consistent with experimental observations.

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• Superconductivity
• Moire materials
• Strongly correlated systems
• Twisted bilayers
• Density functional theory
• Gutzwiller approximation
• Resonating valence bond theory