For the first time, robust superconductivity has been independently observed in twisted WSe2 bilayers by two separate groups [Y. Xia et al., arXiv:2405.14784; Y. Guo et al., arXiv:2406.03418.]. In light of this, we explore the possibility of a universal superconducting pairing mechanism in twisted WSe2 bilayers. Using a continuum band structure model and a phenomenological boson-mediated effective electron-electron attraction, we find that intervalley intralayer pairing predominates over interlayer pairing. Notably, despite different experimental conditions, both twisted WSe2 samples exhibit a comparable effective attraction strength. This consistency suggests that the dominant pairing glue is likely independent of the twist angle and layer polarization, pointing to a universal underlying boson-induced pairing mechanism.
@article{arxiv.2406.19348,
title = {Superconductivity in twisted transition metal dichalcogenide homobilayers},
author = {Jihang Zhu and Yang-Zhi Chou and Ming Xie and Sankar Das Sarma},
journal= {arXiv preprint arXiv:2406.19348},
year = {2025}
}