Quantum anomalous, quantum spin, and quantum valley Hall effects in pentalayer rhombohedral graphene

Recent experiments in pentalayer rhombohedral graphene moir\'e superlattice have observed the quantum anomalous Hall effect at the moir\'e filling factor =1 and various fractions. These effects result from a flat Chern band induced by electron-electron interactions. In this Letter, we show that the many-body effects at =2 give rise to the quantum spin Hall and quantum valley Hall states, even without spin-orbit couplings or valley-dependent potentials, in addition to the quantum anomalous Hall state. These three topological states can be selectively induced by applying and tilting a magnetic field. Furthermore, we demonstrate that at =3 and 4, a combination of the Wigner-like crystal state and topological states can be the ground state. Consequently, the relation between states at the filling factor and its particle-hole counterpart 4- breaks down, which contrasts with the conventional quantum Hall effect in graphene.