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Determine the pairing interaction (spin fluctuations of a triangular-lattice Hubbard model, valley fluctuations, phonons) and the gap symmetry. An answer reproduces $T_c$ versus displacement field and filling from a microscopic model.","problem_ref":"aa7e043ef5ccb5cce26c60307da396708b8764535e21d3442d575a2e8fc84aa3","references":"","settled_by":"A gap-symmetry measurement plus identification of the adjacent ordered state, and a calculation reproducing the superconducting dome.","status_note":"Reported in 2024-2025 by Cornell (3.65 deg) and Columbia (5.0 deg) groups; a 2026 preprint reports superconductivity in twisted trilayer $\\mathrm{WSe_2}$ (arXiv:2606.11495).","title":"Mechanism of superconductivity in twisted bilayer 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