Superconductivity in the twisted bilayer transition metal dichalcogenide WSe2: A quantum cluster study

The observation of flat energy bands in transition metal dichalcogenide bilayers such as twisted WSe2 makes those materials interesting prospects for reproducing the behavior observed in graphene-based systems. We use an effective Hubbard model providing a description of twisted WSe2 to explore the presence of superconductiv-ity, which was previously reported in experiments. Using both the variational cluster approximation and cluster dynamical mean-field theory, we predict the existence of chiral superconductivity of type d +/- id that can be tuned by the twist angle and by the application of a perpendicular displacement field in both electron-and hole-doped systems.

Automated summary

This article investigates the flat energy bands and superconductivity in transition metal dichalcogenide bilayers, and predicts a method to control chiral superconductivity.