Intervalley electron-hole exchange interaction and impurity-assisted recombination of indirect excitons in WS 2 and WSe 2 monolayers - Archive ouverte HAL
Article Dans Une Revue Physical Review B Année : 2022

Intervalley electron-hole exchange interaction and impurity-assisted recombination of indirect excitons in WS 2 and WSe 2 monolayers

Résumé

The variety of excitonic states in tungsten-based dichalcogenide monolayers stems from unique interplay between the spin and valley degrees of freedom. One of the exciton species is the indirect exciton (momentum or valley dark), which is responsible to a series of resonances when the monolayer is charge neutral. We investigate the short-range electron-hole exchange interaction of the indirect exciton, as well as its recombination mechanism mediated by impurities. The analysis provides thorough understanding of the energy and polarization of the zero-phonon indirect exciton resonance in the emission spectrum.

Dates et versions

hal-03871299 , version 1 (25-11-2022)

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Citer

Pengke Li, Cedric Robert, Dinh van Tuan, Lei Ren, Min Yang, et al.. Intervalley electron-hole exchange interaction and impurity-assisted recombination of indirect excitons in WS 2 and WSe 2 monolayers. Physical Review B, 2022, 106 (8), pp.085414. ⟨10.1103/PhysRevB.106.085414⟩. ⟨hal-03871299⟩
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