Theory of topological superconductivity and antiferromagnetic correlated insulators in twisted bilayer WSe₂.

ABSTRACT: Since the very recent discovery of unconventional superconductivity in twisted WSe₂ homobilayers at filling ν = - 1, considerable interest has arisen in revealing its mechanism. In this paper, we developed a three-band tight-binding model with non-trivial band topology by direct Wannierization of the low-energy continuum model. Incorporating both onsite Hubbard repulsion and next-nearest-neighbor attraction, we then performed a mean-field analysis of the microscopic model and obtained a phase diagram qualitatively consistent with the experiment results. For zero or weak displacement field, the ground state is a Chern number C = ± 2 topological superconductor in the Altland-Zirnbauer A-class (breaking time-reversal but preserving total S_z symmetry) with inter-valley pa

SUBMITTER: Tuo C 

PROVIDER: S-EPMC12569151 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature