Excited Rydberg States in MoSe2/WSe2 Heterostructures

Jacob Viner; Liam P. McDonnell; David Ruiz-Tijerina; Pasqual Rivera; Xiaodong Xu; Vladimir Fal'ko; David C. Smith

doi:10.1088/2053-1583/ac0296

Excited Rydberg States in MoSe2/WSe2 Heterostructures

Jacob Viner, Liam P. McDonnell, David Ruiz-Tijerina, Pasqual Rivera, Xiaodong Xu, Vladimir Fal'ko, David C. Smith

National Graphene Institute - Administration

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Abstract

The functional form of Coulomb interactions in the transition metal dichalcogenides 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 transition metal dichalcogenide structures.

Original language	English
Article number	035047
Journal	2 D Materials
Volume	8
Issue number	3
DOIs	https://doi.org/10.1088/2053-1583/ac0296
Publication status	Published - 7 Jun 2021

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title = "Excited Rydberg States in MoSe2/WSe2 Heterostructures",

abstract = "The functional form of Coulomb interactions in the transition metal dichalcogenides 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 \textasciitilde{}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 transition metal dichalcogenide structures.",

author = "Jacob Viner and McDonnell, \{Liam P.\} and David Ruiz-Tijerina and Pasqual Rivera and Xiaodong Xu and Vladimir Fal'ko and Smith, \{David C.\}",

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doi = "10.1088/2053-1583/ac0296",

language = "English",

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T1 - Excited Rydberg States in MoSe2/WSe2 Heterostructures

AU - Viner, Jacob

AU - McDonnell, Liam P.

AU - Ruiz-Tijerina, David

AU - Rivera, Pasqual

AU - Xu, Xiaodong

AU - Fal'ko, Vladimir

AU - Smith, David C.

PY - 2021/6/7

Y1 - 2021/6/7

N2 - The functional form of Coulomb interactions in the transition metal dichalcogenides 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 transition metal dichalcogenide structures.

AB - The functional form of Coulomb interactions in the transition metal dichalcogenides 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 transition metal dichalcogenide structures.

U2 - 10.1088/2053-1583/ac0296

DO - 10.1088/2053-1583/ac0296

M3 - Article

SN - 2053-1583

VL - 8

JO - 2 D Materials

JF - 2 D Materials

IS - 3

M1 - 035047

ER -

Excited Rydberg States in MoSe2/WSe2 Heterostructures

Abstract

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