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Determine whether this is a continuous Mott transition from a Fermi liquid to a spin liquid with a spinon Fermi surface, a transition into a magnetically ordered insulator, or a disorder-broadened first-order transition. An answer specifies the insulating state, the critical exponents, and the behaviour of the effective mass and spin susceptibility at the critical point.","problem_ref":null,"references":"","settled_by":"Thermodynamic measurement of electronic specific heat or spin susceptibility across the transition, together with optical or tunnelling measurement of the charge gap, showing whether a gapless spin sector survives in the insulator.","status_note":"Both 2021 experiments reported continuous transitions; explanations based on spinon Fermi surfaces, magnetic order and disorder all remain in use as of 2026, to this survey's knowledge.","title":"Nature of the bandwidth-tuned Mott transition in moire 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