Moire excitons in MoSe₂-WSe₂ heterobilayers and heterotrilayers.

ABSTRACT: Layered two-dimensional materials exhibit rich transport and optical phenomena in twisted or lattice-incommensurate heterostructures with spatial variations of interlayer hybridization arising from moiré interference effects. Here, we report experimental and theoretical studies of excitons in twisted heterobilayers and heterotrilayers of transition metal dichalcogenides. Using MoSe₂-WSe₂ stacks as representative realizations of twisted van der Waals bilayer and trilayer heterostructures, we observe contrasting optical signatures and interpret them in the theoretical framework of interlayer moiré excitons in different spin and valley configurations. We conclude that the photoluminescence of MoSe₂-WSe₂ heterobilayer is consistent with joint contrib

SUBMITTER: Forg M 

PROVIDER: S-EPMC7955063 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature