Article Dans Une Revue 2D Materials Année : 2022

Excitons and trions in WSSe monolayers

Résumé

The possibility of almost linear tuning of the band gap and of the electrical and optical properties in monolayers (MLs) of semiconducting transition metal dichalcogenide (S-TMD) alloys opens up the way to fabricate materials with on-demand characteristics. By making use of photoluminescence spectroscopy, we investigate optical properties of WSSe MLs with a S/Se ratio of 57/43 deposited on SiO 2 /Si substrate and encapsulated in hexagonal BN flakes. Similarly to the ‘ parent ’ WS 2 and WSe 2 MLs, we assign the WSSe MLs to the ML family with the dark ground exciton state. We find that, in addition to the neutral bright A exciton line, three observed emission lines are associated with negatively charged excitons. The application of in-plane and out-of-plane magnetic fields allows us to assign undeniably the bright and dark (spin- and momentum-forbidden) negative trions as well as the phonon replica of the dark spin-forbidden complex. Furthermore, the existence of the single photon emitters in the WSSe ML is also demonstrated, thus prompting the opportunity to enlarge the wavelength range for potential future quantum applications of S-TMDs.

Fichier principal
Vignette du fichier
Pucko_2023_2D_Mater._10_015018.pdf (1.28 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
Licence

Dates et versions

hal-04740751 , version 1 (16-12-2024)

Licence

Identifiants

Citer

Katarzyna Olkowska Pucko, Elena Blundo, Natalia Zawadzka, Salvatore Cianci, Diana Vaclavkova, et al.. Excitons and trions in WSSe monolayers. 2D Materials, 2022, 10 (1), pp.015018. ⟨10.1088/2053-1583/aca915⟩. ⟨hal-04740751⟩
113 Consultations
112 Téléchargements

Altmetric

Partager

  • More