Probing moire excitons in MoSe2/WSe2 heterobilayers by combined micro-photoluminescence and lateral force microscopy
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
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2025
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| author | Caussou, L. Moutaabbid, H. Bernard, M. Margaillan, F. Taniguchi, T. Watanabe, K. Lagoin, C. Dubin, F. Voliotis, V. |
| author_facet | Caussou, L. Moutaabbid, H. Bernard, M. Margaillan, F. Taniguchi, T. Watanabe, K. Lagoin, C. Dubin, F. Voliotis, V. |
| contents | We study interlayer excitons in MoSe2/WSe2 heterobilayers, by combining lateral force microscopy and micro-photoluminescence spectroscopy. This allows us to correlate the spatial profile of the moiré superlattice with the distribution of optically active states accessible to interlayer excitons. In heterostructures where a few degrees twist angle is imposed between the MoSe and WSe crystallographic axes, we show that a continuous moiré lattice is realized across areas close to the optical diffraction limit. In such regions, the photoluminescence reduces to a few narrow-band lines only, energetically distributed consistently with the geometry of the moiré lattice. This correlation reveals that interlayer excitons explore a controlled periodic confinement, paving the way towards implementations of Bose-Hubbard models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_16539 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing moire excitons in MoSe2/WSe2 heterobilayers by combined micro-photoluminescence and lateral force microscopy Caussou, L. Moutaabbid, H. Bernard, M. Margaillan, F. Taniguchi, T. Watanabe, K. Lagoin, C. Dubin, F. Voliotis, V. Mesoscale and Nanoscale Physics We study interlayer excitons in MoSe2/WSe2 heterobilayers, by combining lateral force microscopy and micro-photoluminescence spectroscopy. This allows us to correlate the spatial profile of the moiré superlattice with the distribution of optically active states accessible to interlayer excitons. In heterostructures where a few degrees twist angle is imposed between the MoSe and WSe crystallographic axes, we show that a continuous moiré lattice is realized across areas close to the optical diffraction limit. In such regions, the photoluminescence reduces to a few narrow-band lines only, energetically distributed consistently with the geometry of the moiré lattice. This correlation reveals that interlayer excitons explore a controlled periodic confinement, paving the way towards implementations of Bose-Hubbard models. |
| title | Probing moire excitons in MoSe2/WSe2 heterobilayers by combined micro-photoluminescence and lateral force microscopy |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2511.16539 |