Confined-state physics and signs of fermionization of moir\'e excitons in WSe$_2$/MoSe$_2$ heterobilayers
| Autor: | F Lohof, J Michl, A Steinhoff, B Han, M von Helversen, S Tongay, K Watanabe, T Taniguchi, S Höfling, S Reitzenstein, C Anton-Solanas, C Gies, C Schneider |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Condensed Matter - Materials Science
Condensed Matter - Mesoscale and Nanoscale Physics Mechanics of Materials Mechanical Engineering Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences General Materials Science General Chemistry Condensed Matter Physics |
| Popis: | We revisit and extend the standard bosonic interpretation of interlayer excitons (ILX) in the moiré potential of twisted heterostructures of transition-metal dichalcogenides. In our experiments, we probe a high quality MoSe2/WSe2 van der Waals bilayer heterostructure via density-dependent photoluminescence spectroscopy and reveal strongly developed, unconventional spectral shifts of the emergent moiré exciton resonances. The observation of saturating blueshifts of successive exciton resonances allow us to explain their physics in terms of a model utilizing fermionic saturable absorbers. This approach is strongly inspired by established quantum-dot models, which underlines the close analogy of ILX trapped in pockets of the moiré potential, and quantum emitters with discrete eigenstates. |
| Databáze: | OpenAIRE |
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