Moire-controllable exciton localization and dynamics through spatially-modulated inter- and intralayer excitons in a MoSe₂/WS₂ heterobilayer.

ABSTRACT: Moiré heterobilayers exhibiting spatially varying exciton localization that can be precisely controlled through the twist angle have emerged as exciting platforms for studying complex quantum phenomena. Here, we study the exciton landscape in MoSe₂/WS₂ heterobilayers through synergistic first-principles GW plus Bethe Salpeter equation (GW-BSE) calculations and complementary time- and angle-resolved photoemission spectroscopy (tr-ARPES). We find that the MoSe₂/WS₂ heterobilayer has a type I band alignment at large twist angles. In contrast, at small twist angles, there exist simultaneous spatially modulated regions of local type I band alignment, hosting bright intralayer excitons, and local type II band alignment, hosting long-lived interlayer ex

SUBMITTER: Guo J 

PROVIDER: S-EPMC12717132 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature