Independent tuning of exciton g-factors and electric dipole moments in twisted MoS2/WS2 heterostructures

Twist-angle engineering of van der Waals heterobilayers is promising for designing quantum materials. However, establishing a microscopic framework connecting the geometry of moiré superlattices to ex- perimentally accessible observables has remained unexplored. Here we report how the twist angle in MoS2 /WS2 heterobilayers simultaneously shapes electronic, magnetic and dipolar responses. The moiré superlattice preserves monolayer spin-valley locking, whereas the long-range moiré potential traps elec- trons and holes in spatially separated stackings. The exciton g-factor is fixed by the local high-symmetry stacking, resulting in two discrete, opposite-sign Zeeman responses; the intrinsic electric dipole moment can be continuously modulated by the twist angle.