Quadrupolar excitons in MoSe2 bilayers

Jakub Jasiński; Joakim Hagel; Samuel Brem; Edith Wietek; Takashi Taniguchi; Kenji Watanabe; Alexey Chernikov; Nicolas Bruyant; Mateusz Dyksik; Alessandro Surrente; Michał Baranowski; Duncan K. Maude; Ermin Malic; Paulina Plochocka

doi:10.1038/s41467-025-56586-3

ジャーナル論文 Quadrupolar excitons in MoSe2 bilayers

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Jakub Jasiński, Joakim Hagel, Samuel Brem, Edith Wietek, Takashi Taniguchi, Kenji Watanabe, Alexey Chernikov, Nicolas Bruyant, Mateusz Dyksik, Alessandro Surrente, Michał Baranowski, Duncan K. Maude, Ermin Malic, Paulina Plochocka. Quadrupolar excitons in MoSe2 bilayers. Nature Communications. 2025, 16 (1), 1382. https://doi.org/10.1038/s41467-025-56586-3

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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 unam- biguously 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.

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