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

ABSTRACT: Recently, the twist angle between adjacent sheets of stacked van der Waals materials emerged as a new knob to engineer correlated states of matter in two-dimensional heterostructures in a controlled manner, giving rise to emergent phenomena such as superconductivity or correlated insulating states. Here, we use an ab initio based approach to characterize the electronic properties of twisted bilayer MoS₂. We report that, in marked contrast to twisted bilayer graphene, slightly hole-doped MoS₂ realizes a strongly asymmetric p_x-p_y Hubbard model on the honeycomb lattice, with two almost entirely dispersionless bands emerging due to destructive interference. The origin of these dispersionless bands, is similar to that of the flat bands in the prototyp

SUBMITTER: Xian L 

PROVIDER: S-EPMC8463715 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature