Interplay of valley polarized dark trion and dark exciton-polaron in monolayer WSe₂.

ABSTRACT: The interactions between charges and excitons involve complex many-body interactions at high densities. The exciton-polaron model has been adopted to understand the Fermi sea screening of charged excitons in monolayer transition metal dichalcogenides. The results provide good agreement with absorption measurements, which are dominated by dilute bright exciton responses. Here we investigate the Fermi sea dressing of spin-forbidden dark excitons in monolayer WSe₂. With a Zeeman field, the valley-polarized dark excitons show distinct p-doping dependence in photoluminescence when the carriers reach a critical density. This density can be interpreted as the onset of strongly modified Fermi sea interactions and shifts with increasing exciton density. Through valley-selective excitatio

SUBMITTER: Cong X 

PROVIDER: S-EPMC10500002 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature