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Quadrupolar excitons in MoSe2 bilayers

Author

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  • Jakub Jasiński

    (Wroclaw University of Science and Technology
    CNRS UPR 3228, Université Grenoble Alpes, Université Toulouse)

  • Joakim Hagel

    (Chalmers University of Technology)

  • Samuel Brem

    (Philipps-Universität Marburg)

  • Edith Wietek

    (Technische Universität Dresden)

  • Takashi Taniguchi

    (National Institute for Materials Science)

  • Kenji Watanabe

    (National Institute for Materials Science)

  • Alexey Chernikov

    (Technische Universität Dresden)

  • Nicolas Bruyant

    (CNRS UPR 3228, Université Grenoble Alpes, Université Toulouse)

  • Mateusz Dyksik

    (Wroclaw University of Science and Technology)

  • Alessandro Surrente

    (Wroclaw University of Science and Technology)

  • Michał Baranowski

    (Wroclaw University of Science and Technology)

  • Duncan K. Maude

    (CNRS UPR 3228, Université Grenoble Alpes, Université Toulouse)

  • Ermin Malic

    (Philipps-Universität Marburg)

  • Paulina Plochocka

    (Wroclaw University of Science and Technology
    CNRS UPR 3228, Université Grenoble Alpes, Université Toulouse)

Abstract

The quest for platforms to generate and control exotic excitonic states has greatly benefited from the advent of transition metal dichalcogenide (TMD) monolayers and their heterostructures. Among the unconventional excitonic states, quadrupolar excitons—a superposition of two dipolar excitons with anti-aligned dipole moments—are of great interest for applications in quantum simulations and for the investigation of many-body physics. Here, we unambiguously demonstrate the emergence of quadrupolar excitons in natural MoSe2 homobilayers, whose energy shifts quadratically in electric field. In contrast to trilayer systems, MoSe2 homobilayers have many advantages, which include a larger coupling between dipolar excitons. Our experimental observations are complemented by many-particle theory calculations offering microscopic insights in the formation of quadrupolar excitons. Our results suggest TMD homobilayers as ideal platform for the engineering of excitonic states and their interaction with light and thus candidate for carrying out on-chip quantum simulations.

Suggested Citation

  • Jakub Jasiński & Joakim Hagel & Samuel Brem & Edith Wietek & Takashi Taniguchi & Kenji Watanabe & Alexey Chernikov & Nicolas Bruyant & Mateusz Dyksik & Alessandro Surrente & Michał Baranowski & Duncan, 2025. "Quadrupolar excitons in MoSe2 bilayers," Nature Communications, Nature, vol. 16(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-56586-3
    DOI: 10.1038/s41467-025-56586-3
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