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Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice

Moiré superlattices of semiconducting transition metal dichalcogenides enable unprecedented spatial control of electron wavefunctions, leading to emerging quantum states. The breaking of translational symmetry further introduces a new degree of freedom: high symmetry moiré sites of energy minima beh...

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Autores principales: Lian, Zhen, Chen, Dongxue, Meng, Yuze, Chen, Xiaotong, Su, Ying, Banerjee, Rounak, Taniguchi, Takashi, Watanabe, Kenji, Tongay, Sefaattin, Zhang, Chuanwei, Cui, Yong-Tao, Shi, Su-Fei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10439888/
https://www.ncbi.nlm.nih.gov/pubmed/37598211
http://dx.doi.org/10.1038/s41467-023-40783-z
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author Lian, Zhen
Chen, Dongxue
Meng, Yuze
Chen, Xiaotong
Su, Ying
Banerjee, Rounak
Taniguchi, Takashi
Watanabe, Kenji
Tongay, Sefaattin
Zhang, Chuanwei
Cui, Yong-Tao
Shi, Su-Fei
author_facet Lian, Zhen
Chen, Dongxue
Meng, Yuze
Chen, Xiaotong
Su, Ying
Banerjee, Rounak
Taniguchi, Takashi
Watanabe, Kenji
Tongay, Sefaattin
Zhang, Chuanwei
Cui, Yong-Tao
Shi, Su-Fei
author_sort Lian, Zhen
collection PubMed
description Moiré superlattices of semiconducting transition metal dichalcogenides enable unprecedented spatial control of electron wavefunctions, leading to emerging quantum states. The breaking of translational symmetry further introduces a new degree of freedom: high symmetry moiré sites of energy minima behaving as spatially separated quantum dots. We demonstrate the superposition between two moiré sites by constructing a trilayer WSe(2)/monolayer WS(2) moiré heterojunction. The two moiré sites in the first layer WSe(2) interfacing WS(2) allow the formation of two different interlayer excitons, with the hole residing in either moiré site of the first layer WSe(2) and the electron in the third layer WSe(2). An electric field can drive the hybridization of either of the interlayer excitons with the intralayer excitons in the third WSe(2) layer, realizing the continuous tuning of interlayer exciton hopping between two moiré sites and a superposition of the two interlayer excitons, distinctively different from the natural trilayer WSe(2).
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spelling pubmed-104398882023-08-21 Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice Lian, Zhen Chen, Dongxue Meng, Yuze Chen, Xiaotong Su, Ying Banerjee, Rounak Taniguchi, Takashi Watanabe, Kenji Tongay, Sefaattin Zhang, Chuanwei Cui, Yong-Tao Shi, Su-Fei Nat Commun Article Moiré superlattices of semiconducting transition metal dichalcogenides enable unprecedented spatial control of electron wavefunctions, leading to emerging quantum states. The breaking of translational symmetry further introduces a new degree of freedom: high symmetry moiré sites of energy minima behaving as spatially separated quantum dots. We demonstrate the superposition between two moiré sites by constructing a trilayer WSe(2)/monolayer WS(2) moiré heterojunction. The two moiré sites in the first layer WSe(2) interfacing WS(2) allow the formation of two different interlayer excitons, with the hole residing in either moiré site of the first layer WSe(2) and the electron in the third layer WSe(2). An electric field can drive the hybridization of either of the interlayer excitons with the intralayer excitons in the third WSe(2) layer, realizing the continuous tuning of interlayer exciton hopping between two moiré sites and a superposition of the two interlayer excitons, distinctively different from the natural trilayer WSe(2). Nature Publishing Group UK 2023-08-19 /pmc/articles/PMC10439888/ /pubmed/37598211 http://dx.doi.org/10.1038/s41467-023-40783-z Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Lian, Zhen
Chen, Dongxue
Meng, Yuze
Chen, Xiaotong
Su, Ying
Banerjee, Rounak
Taniguchi, Takashi
Watanabe, Kenji
Tongay, Sefaattin
Zhang, Chuanwei
Cui, Yong-Tao
Shi, Su-Fei
Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice
title Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice
title_full Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice
title_fullStr Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice
title_full_unstemmed Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice
title_short Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice
title_sort exciton superposition across moiré states in a semiconducting moiré superlattice
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10439888/
https://www.ncbi.nlm.nih.gov/pubmed/37598211
http://dx.doi.org/10.1038/s41467-023-40783-z
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