Localisation-to-delocalisation transition of moire excitons in WSe₂/MoSe₂ heterostructures.

ABSTRACT: Moiré excitons (MXs) are electron-hole pairs localised by the periodic (moiré) potential forming in two-dimensional heterostructures (HSs). MXs can be exploited, e.g., for creating nanoscale-ordered quantum emitters and achieving or probing strongly correlated electronic phases at relatively high temperatures. Here, we studied the exciton properties of WSe₂/MoSe₂ HSs from T = 6 K to room temperature using time-resolved and continuous-wave micro-photoluminescence also under a magnetic field. The exciton dynamics and emission lineshape evolution with temperature show clear signatures that MXs de-trap from the moiré potential and turn into free interlayer excitons (IXs) for temperatures above 100 K. The MX-to-IX transition is also apparent from the exciton magnetic momen

SUBMITTER: Blundo E 

PROVIDER: S-EPMC10844653 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature