Excited Rydberg states in MoSe2/WSe2 heterostructures
Excited Rydberg states in MoSe2/WSe2 heterostructures
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.
Viner, Jacob
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Mcdonnell, Liam
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Ruiz-Tijerina, David
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Rivera, Pasqual
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Xu, Xiaodong
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Fal'ko, Vladimir
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Smith, David C.
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July 2021
Viner, Jacob
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Mcdonnell, Liam
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Ruiz-Tijerina, David
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Rivera, Pasqual
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Xu, Xiaodong
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Fal'ko, Vladimir
2bcc7a4b-d57c-4bd4-8516-15f82727f5e4
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
Viner, Jacob, Mcdonnell, Liam, Ruiz-Tijerina, David, Rivera, Pasqual, Xu, Xiaodong, Fal'ko, Vladimir and Smith, David C.
(2021)
Excited Rydberg states in MoSe2/WSe2 heterostructures.
2D Materials, 8 (3).
(doi:10.1088/2053-1583/ac0296).
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.
Text
Excited Rydberg States in TMDC Heterostructures18
- Accepted Manuscript
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Accepted/In Press date: 18 May 2021
e-pub ahead of print date: 7 June 2021
Published date: July 2021
Identifiers
Local EPrints ID: 480383
URI: http://eprints.soton.ac.uk/id/eprint/480383
ISSN: 2053-1583
PURE UUID: 36f0d034-9df5-4094-aa80-d495437f37f1
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Date deposited: 01 Aug 2023 20:14
Last modified: 16 Mar 2024 12:27
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Author:
Jacob Viner
Author:
Liam Mcdonnell
Author:
David Ruiz-Tijerina
Author:
Pasqual Rivera
Author:
Xiaodong Xu
Author:
Vladimir Fal'ko
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