Nature of Long-Lived Moire Interlayer Excitons in Electrically Tunable MoS₂/MoSe₂ Heterobilayers.

ABSTRACT: Interlayer excitons in transition-metal dichalcogenide heterobilayers combine high binding energy and valley-contrasting physics with a long optical lifetime and strong dipolar character. Their permanent electric dipole enables electric-field control of the emission energy, lifetime, and location. Device material and geometry impact the nature of the interlayer excitons via their real- and momentum-space configurations. Here, we show that interlayer excitons in MoS₂/MoSe₂ heterobilayers are formed by charge carriers residing at the Brillouin zone edges, with negligible interlayer hybridization. We find that the moiré superlattice leads to the reversal of the valley-dependent optical selection rules, yielding a positively valued g-factor and cross-polarized photolumine

SUBMITTER: Alexeev EM 

PROVIDER: S-EPMC11403766 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature