Interferences of electrostatic moire potentials and bichromatic superlattices of electrons and excitons in transition metal dichalcogenides

Recent experimental progresses have demonstrated the great potential of electronic and excitonic moire superlattices in transition metal dichalcogenides (TMDs) for quantum many-body simulations and quantum optics applications. Here we reveal that the moire potential landscapes in the TMDs heterostructures have an electrostatic origin from the spontaneous charge transfer across the heterointerfaces dependent on the atomic registry. This allows engineering tunable multi-chromatic superlattices through the interference of moire potentials from independently configurable heterointerfaces in multilayers. We show examples of bichromatic moire potentials for valley electrons, holes, and interlayer trions in MX2/M'X'(2)/MX2 trilayers, which can be strain switched from multi-orbital periodic superlattices to quasi-periodic disordered landscape. The trilayer moire also hosts two independently configurable triangular superlattices of neutral excitons with opposite electric dipoles. These findings greatly enrich the versatility and controllability of TMDs moire as a quantum simulation platform.