Electric field tunable correlated insulating states in AB stacked twisted MoTe₂

Twisted MoTe₂ homobilayer has emerged as an attractive platform for studying strong-correlation physics. A recent breakthrough is the observation of fractional quantum anomalous hall effect in AA stacked homobilayer. Compared to the AA stacking with a honeycomb moiré superlattice lattice and strong interlayer hybridization, AB stacked twisted homobilayer hosts a triangular lattice with negligible interlayer tunneling and well-defined layer degree of freedom. Here we study the AB stacked homobilayer using combined transport and optical measurements. We observe correlated insulating states at multiple fractional fillings of electrons and holes. In the electron side, a displacement field has no effect on the correlated states. In contrast, the states at fractional hole fillings exhibit transitions between correlated insulating states when electric field induces full layer pseudospin polarization, likely from the change of charge configuration. Our results reveal rich correlated physics in AB stacked MoTe₂ homobilayer.