Realization of nearly dispersionless bands with strong orbital anisotropy from destructive interference in twisted bilayer MoS2

• DOI: 10.1038/s41467-021-25922-8
• Publication Date: 2021-10-08T12:04:54Z
• Authors: Lede Xian; Martin Claassen; Dominik Kiese; Michael M. Scherer; Simon Trebst; Dante M. Kennes; Angel Rubio
• Keywords: Bilayer graphene

Recently, the twist angle between adjacent sheets of stacked van der Waals materials emerged as a new knob to engineer correlated states matter in two-dimensional heterostructures controlled manner, giving rise emergent phenomena such superconductivity or insulating states. Here, we use an ab initio based approach characterize electronic properties twisted bilayer MoS2. We report that, marked contrast graphene, slightly hole-doped MoS2 realizes strongly asymmetric px-py Hubbard model on honeycomb lattice, with two almost entirely dispersionless bands emerging due destructive interference. The origin these bands, is similar that flat prototypical Lieb Kagome lattices and co-exists general band flattening at small moiré study collective behavior presence interactions, array different magnetic orbitally-ordered phases, which may be susceptible quantum fluctuations exotic, purely quantum, matter.