Shengwei Jiang (Shanghai Jiaotong Unverisity)

Two-dimensional moiré materials present unprecedented opportunities to explore quantum phases of matter arising from the interplay of band topology and strong correlations. One of the most striking examples is the recent observation of the fractional quantum anomalous Hall (FQAH) effect in twisted bilayer MoTe2 (tMoTe2). The electronic ground states are usually expected to be sensitive to the twist angle, filling factor, and out-of-plane electric field, as they determine the electron bandwidth and correlation strength in the moiré system. Here, we report a systematic study of the twist angle dependence of the competing correlated and topological electronic states, on which balance can be tipped by applying an out-of-plane electric field. Our study demonstrates tMoTe2 as a fascinating platform for exploring unexpected correlated phases with nontrivial topology and fractional excitations.