Quadrupolar excitons in MoSe2 bilayers
Artikel i vetenskaplig tidskrift, 2025
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.
Författare
Jakub Jasinski
Université de Toulouse
Politechnika Wrocławska
Université Grenoble Alpes
Joakim Hagel
Chalmers, Fysik, Kondenserad materie- och materialteori
Samuel Brem
Philipps-Universität Marburg
Edith Wietek
Technische Universität Dresden
Takashi Taniguchi
National Institute for Materials Science (NIMS)
Kenji Watanabe
National Institute for Materials Science (NIMS)
Alexey Chernikov
Technische Universität Dresden
Nicolas Bruyant
Université Grenoble Alpes
Université de Toulouse
Mateusz Dyksik
Politechnika Wrocławska
Alessandro Surrente
Politechnika Wrocławska
Michal Baranowski
Politechnika Wrocławska
Duncan K. Maude
Université de Toulouse
Université Grenoble Alpes
Ermin Malic
Philipps-Universität Marburg
Paulina Plochocka
Politechnika Wrocławska
Université de Toulouse
Université Grenoble Alpes
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 16 1 1382Ämneskategorier (SSIF 2025)
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
Annan fysik
DOI
10.1038/s41467-025-56586-3
PubMed
39910056