Clarify the role of WSe2-induced Ising spin-orbit coupling in moiré graphene superconductivity

Ascertain the role of WSe2-induced Ising spin-orbit coupling and other proximity-induced effects in stabilizing superconductivity versus competing correlated phases in twisted bilayer graphene and related moiré graphene stacks, and determine how these effects influence the emergence and robustness of superconductivity relative to other correlated orders.

Background

The paper analyzes superconductivity across twisted graphene multilayers (twisted bilayer, twisted double bilayer, and helical trilayer) using a Kohn-Luttinger-like mechanism that incorporates screened Coulomb interactions, phonon dressing, and Umklapp processes. While the framework captures several experimental trends and predicts weak superconductivity in certain stacks, the authors note that proximity to WSe2 can significantly affect superconducting behavior via induced spin-orbit coupling.

In particular, the Ising spin-orbit coupling (and other WSe2-induced effects) is experimentally known to influence correlated phases in moiré graphene systems, yet its precise role in stabilizing superconductivity relative to other competing phases remains unresolved. The authors explicitly state that this aspect is still unclear and requires further theoretical and experimental investigation.