Quadrupolar excitons in MoSe2 bilayers
Journal article, 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.
Author
Jakub Jasinski
University of Toulouse
Wrocław University of Science and Technology
Grenoble Alpes University
Joakim Hagel
Chalmers, Physics, Condensed Matter and Materials Theory
Samuel Brem
Philipps University 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
Grenoble Alpes University
University of Toulouse
Mateusz Dyksik
Wrocław University of Science and Technology
Alessandro Surrente
Wrocław University of Science and Technology
Michal Baranowski
Wrocław University of Science and Technology
Duncan K. Maude
University of Toulouse
Grenoble Alpes University
Ermin Malic
Philipps University Marburg
Paulina Plochocka
Wrocław University of Science and Technology
University of Toulouse
Grenoble Alpes University
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 16 1 1382Subject Categories (SSIF 2025)
Atom and Molecular Physics and Optics
Condensed Matter Physics
Other Physics Topics
DOI
10.1038/s41467-025-56586-3
PubMed
39910056