Title: Gossamer Superconductivity in Moire WSe2, Bilayer

Speaker:  Prof. Hui-Ke Jin, ShanghaiTech University

Time: 10:00 am, June 3 (Wednesday), 2026

Place: Room M830,IOP-CAS(中国科学院物理究所M830)

Abstract
Moire transition metal dichalcogenides have served as a versatile platformfor simulating Hubbard physics. Recent experiments have identified robust superconductivity in moire bilayer WSe2 for certain twist angles. Here, wepropose the gossamer nature of the superconductivity recently discovered at half-filling and zero displacement field in twisted WSe2. By mapping the moire 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 andantiferromagnetic 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 statevanishes rapidly upon density doping, consistent with experimental observations.

Reference: arXiv:2605.03766