Excited Rydberg states in MoSe 2 /WSe 2 heterostructures

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

doi:10.1088/2053-1583/ac0296

Excited Rydberg states in MoSe ₂ /WSe ₂ heterostructures

Journal Article · Mon Jun 07 00:00:00 EDT 2021 · 2D Materials

DOI:https://doi.org/10.1088/2053-1583/ac0296· OSTI ID:1852527

^[1]; ; ; Rivera, Pasqual; Xu, Xiaodong; Fal’Ko, Vladimir I.;

OSTI

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/WSe₂heterostructures. 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.

Research Organization:: Univ. of Washington, Seattle, WA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: SC0018171

OSTI ID:: 1852527

Journal Information:: 2D Materials, Journal Name: 2D Materials Journal Issue: 3 Vol. 8; ISSN 2053-1583

Publisher:: IOP Publishing

Country of Publication:: United States

Language:: English

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