Superconductivity in twisted WSe₂: from symmetry-based classification to energetics

The discovery of superconductivity in twisted bilayer WSe₂ [1,2] has sparked significant interest in understanding the origin and characteristics of the observed superconducting states. Motivated by the experiments in twisted WSe₂ moiré structures, we investigate possible pairing channels in this system through symmetry classification and analysis of effective Hamiltonians. For the effective interactions, we build on the recent construction in terms of compact molecular orbitals with topology-induced quantum fluctuations [3]. In particular, we highlight the interplay among lattice-symmetries, band-topology, and electronic interactions close to half-filling in shaping superconducting states. Our results provide insights into the pairing mechanisms that favor particular superconducting channels, offering potential pathways to control and enhance superconductivity in twisted WSe₂ moiré structures and related systems.

[1] Xia et al., arXiv:2405.14784.

[2] Guo et al., arXiv:2406.03418.

[3] F. Xie et al, arXiv:2408.10185.