Topological Moiré Platform Based on  Γ-point Twisting

Moiré engineering is rapidly moving beyond graphene, opening new routes to correlated and topological phenomena. In this talk, I will focus on moiré materials whose low-energy states lie at the Γ point, including both twisted bilayer and twisted multilayer architectures. Using large-scale ab initio calculations together with continuum models, we characterize their electronic structure, valley physics, and topological invariants. I will highlight the role of interlayer hybridization and mechanisms that enable isolated topological Γ-valley bands. These results broaden the moiré materials landscape and suggest experimentally accessible pathways to valley-selective and topology-driven phases.