Excited Rydberg states in MoSe2/WSe2heterostructures

Jacob J.S. Viner, Liam P. McDonnell, David A. Ruiz-Tijerina, Pasqual Rivera, Xiaodong Xu, Vladimir I. Fal'Ko, David C. Smith

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The functional form of Coulomb interactions in the transition metal dichalcogenides (TDMs) and other van der Waals solids is critical to many of their unique properties, e.g. strongly-correlated electron states, superconductivity and emergent ferromagnetism. This paper presents measurements of key excitonic energy levels in MoSe2/WSe2 heterostructures. These measurements are obtained from resonance Raman experiments on specific Raman peaks only observed at excited states of the excitons. This data is used to validate a model of the Coulomb potential in these structures which predicts the exciton energies to within ∼5 meV. This model is used to determine the effect of heterostructure formation on the single-particle band gaps of the layers and will have a wide applicability in designing the next generation of more complex TDM structures.

Original languageEnglish
Article number035047
Journal2D Materials
Volume8
Issue number3
DOIs
StatePublished - Jul 2021
Externally publishedYes

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