Mechanism of superconductivity in twisted moiré systems

Determine the respective roles of electron–phonon coupling and electron–electron interactions in Cooper pair formation in twisted graphene and transition‑metal dichalcogenide moiré systems, and ascertain whether a common microscopic mechanism underlies superconductivity across these platforms.

Background

Moiré materials formed by stacking and twisting 2D layers can host flat bands and strong correlations, leading to unconventional superconductivity alongside correlated insulators and other emergent phases. Despite extensive experiments on magic‑angle graphene and related systems, the pairing glue and universality of the superconducting mechanism remain unresolved.

Clarifying whether phonons, electron correlations, or intertwined effects dominate, and whether a single mechanism applies across twisted graphene multilayers and twisted TMD bilayers, is pivotal for predictive control and engineering of superconductivity in moiré platforms.