Article Stark Effects of Rydberg Excitons in a Monolayer WSe2 P–N Junction

Zhen Lian ; Yun-Mei Li ; Li Yan ; Lei Ma ; Dongxue Chen ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Chuanwei Zhang ; Su-Fei Shi

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Zhen Lian, Yun-Mei Li, Li Yan, Lei Ma, Dongxue Chen, Takashi Taniguchi, Kenji Watanabe, Chuanwei Zhang, Su-Fei Shi. Stark Effects of Rydberg Excitons in a Monolayer WSe2 P–N Junction. Nano Letters. 2024, 24 (16), 4843-4848. https://doi.org/10.1021/acs.nanolett.4c00134

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(abstract)

The enhanced Coulomb interaction in two-dimensional (2D) semiconductors leads to the tightly bound electron-hole pairs known as excitons. The large binding energy of excitons enables the formation of Rydberg excitons with high principal quantum numbers (n), analogous to Rydberg atoms. Rydberg excitons possess strong interactions among themselves, as well as sensitive responses to external stimuli. Here, we probe Rydberg exciton resonances through photocurrent spectroscopy in a monolayer WSe2 p-n junction formed by a split-gate geometry. We show that an external in-plane electric field not only induces a large Stark shift of Rydberg excitons up to quantum principal number n=3 but also mixes different orbitals and brightens otherwise dark states such as 3p and 3d. Our study provides an exciting platform for engineering Rydberg excitons for new quantum states and quantum sensing.

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  • In Copyright

    This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.4c00134.

Keyword: Rydberg excitons, P−N junction, Photocurrent Spectroscopy, Stark Shift, Orbital Mixing

Date published: 2024-04-12

Publisher: American Chemical Society (ACS)

Journal:

  • Nano Letters (ISSN: 15306984) vol. 24 issue. 16 p. 4843-4848

Funding:

  • Ministry of Science and Technology of the People's Republic of China 2022YFA1204700
  • Air Force Office of Scientific Research FA9550-20-1-0220
  • Division of Electrical, Communications and Cyber Systems ECCS- 2139692
  • Division of Electrical, Communications and Cyber Systems ECCS-2411394
  • Division of Materials Research DMR-1945420
  • Division of Materials Research DMR-2104902
  • Division of Physics PHY-2409943
  • New York State Foundation for Science, Technology and Innovation C180117
  • Office of Multidisciplinary Activities OMR-2228725
  • Japan Society for the Promotion of Science 19H05790
  • Japan Society for the Promotion of Science 20H00354
  • Japan Society for the Promotion of Science 21H05233

Manuscript type: Author's version (Accepted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1021/acs.nanolett.4c00134

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Updated at: 2025-07-28 16:30:25 +0900

Published on MDR: 2025-07-28 16:17:08 +0900

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