Emergent moiré magnetism in twisted 2D magnets

Recent advances in moiré superlattices and twistronics have opened new avenues for discovering emergent quantum phenomena. Numerous breakthroughs have been made in exploring new topological and strongly correlated phases, as well as the emergence of novel magnetic orders in twisted 2D materials. In particular, twisted 2D magnets provide a promising platform for studying novel magnetism through moiré engineering, where twisting layered magnetic crystals introduces spatially modulated interlayer interactions and novel spin textures. Among various 2D magnets, CrI₃ exhibits stacking-dependent interlayer magnetism, where monoclinic stacking favors antiferromagnetic coupling, while rhombohedral stacking gives rise to ferromagnetic coupling. This enables unique opportunities for engineering exotic spin textures and magnetic phases at the nanoscale. Introducing a small twist angle generates a moiré superlattice with periodic variations in layer stacking and leads to periodic ferromagnetic and antiferromagnetic domains, enabling a new platform for exploring magnetic moiré superlattices. In this talk, we survey the recent advances in moiré magnetism and highlight new opportunities in discovering novel magnetic phases in twisted multilayer CrI₃.