Splitting between bright and dark excitons in transition metal dichalcogenide monolayers - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2016

Splitting between bright and dark excitons in transition metal dichalcogenide monolayers

Résumé

The optical properties of transition metal dichalcogenide monolayers such as the two-dimensional semiconductors MoS 2 and WSe 2 are dominated by excitons, Coulomb bound electron-hole pairs. The light emission yield depends on whether the electron-hole transitions are optically allowed (bright) or forbidden (dark). By solving the Bethe-Salpeter equation on top of GW wave functions in density functional theory calculations, we determine the sign and amplitude of the splitting between bright and dark exciton states. We evaluate the influence of the spin-orbit coupling on the optical spectra and clearly demonstrate the strong impact of the intra-valley Coulomb exchange term on the dark-bright exciton fine structure splitting.
Fichier principal
Vignette du fichier
Dark-bright_prb.pdf (293.98 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01868569 , version 1 (05-09-2018)

Identifiants

Citer

J. P. Echeverry, B. Urbaszek, Thierry Amand, Xavier Marie, I.C. Gerber. Splitting between bright and dark excitons in transition metal dichalcogenide monolayers. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 93 (12), pp.121107. ⟨10.1103/PhysRevB.93.121107⟩. ⟨hal-01868569⟩
116 Consultations
213 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More