Quadrupolar excitons in MoSe2 bilayers
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 MoSe<sub>2</sub> homobilayers, whose energy shifts quadratically in electric field. In contrast to trilayer systems, MoSe<sub>2</sub> 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.
Authors
- Edith Wietek (ORCID: https://orcid.org/0000-0001-6681-9260)
- Joakim Hagel (ORCID: https://orcid.org/0000-0002-3858-4174)
- Michał Baranowski (ORCID: https://orcid.org/0000-0002-5974-0850)
- Alessandro Surrente (ORCID: https://orcid.org/0000-0003-4078-4965)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Ermin Malić (ORCID: https://orcid.org/0000-0003-1434-9003)
- Nicolas Bruyant (ORCID: https://orcid.org/0000-0003-4697-4188)
- Jakub Jasiński (ORCID: https://orcid.org/0000-0003-0631-9461)
- Paulina Płochocka (ORCID: https://orcid.org/0000-0002-4019-6138)
- Alexey Chernikov (ORCID: https://orcid.org/0000-0002-9213-2777)
- Mateusz Dyksik (ORCID: https://orcid.org/0000-0003-4945-8795)
- D. K. Maude
- Samuel Brem
Institutions
- Wrocław University of Science and Technology (PL)
- Centre National de la Recherche Scientifique (FR)
- Philipps University of Marburg (DE)
- National Institute for Materials Science (JP)
- Laboratoire National des Champs Magnétiques Intenses (FR)
- Complexity, Topology and Dynamics in Quantum Matter (DE)
- Chalmers University of Technology (SE)
- AGH University of Krakow (PL)
- Technische Universität Dresden (DE)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-02-05
- DOI
- https://doi.org/10.1038/s41467-025-56586-3
- Citations
- 10
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 5.18
Funders
- Deutsche Forschungsgemeinschaft
- Agence Nationale de la Recherche
- Ministry of Education, Culture, Sports, Science and Technology
- Narodowe Centrum Nauki
- Japan Society for the Promotion of Science