Interlayer and moiré excitons in atomically thin double layers: from individual quantum emitters to degenerate ensembles
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| Format: | Preprint |
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2024
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| _version_ | 1866929421327269888 |
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| author | Brotons-Gisbert, Mauro Gerardot, Brian D. Holleitner, Alexander W. Wurstbauer, Ursula |
| author_facet | Brotons-Gisbert, Mauro Gerardot, Brian D. Holleitner, Alexander W. Wurstbauer, Ursula |
| contents | Interlayer excitons (IXs), composed of electron and hole states localized in different layers, excel in bilayers composed of atomically thin van der Waals materials such as semiconducting transition metal dichalcogenides (TMDs) due to drastically enlarged exciton binding energies, exciting spin-valley properties, elongated lifetimes, and large permanent dipoles. The latter allows modification by electric fields and the study of thermalized bosonic quasiparticles, from the single particle level to interacting degenerate dense ensembles. Additionally, the freedom to combine bilayers of different van der Waals materials without lattice or relative twist angle constraints leads to layer hybridized and moiré excitons which can be widely engineered. This review covers fundamental aspects of IXs including correlation phenomena as well as the consequence of moiré superlattices with a strong focus on TMD homo- and hetero-bilayers. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_10713 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Interlayer and moiré excitons in atomically thin double layers: from individual quantum emitters to degenerate ensembles Brotons-Gisbert, Mauro Gerardot, Brian D. Holleitner, Alexander W. Wurstbauer, Ursula Mesoscale and Nanoscale Physics Materials Science Interlayer excitons (IXs), composed of electron and hole states localized in different layers, excel in bilayers composed of atomically thin van der Waals materials such as semiconducting transition metal dichalcogenides (TMDs) due to drastically enlarged exciton binding energies, exciting spin-valley properties, elongated lifetimes, and large permanent dipoles. The latter allows modification by electric fields and the study of thermalized bosonic quasiparticles, from the single particle level to interacting degenerate dense ensembles. Additionally, the freedom to combine bilayers of different van der Waals materials without lattice or relative twist angle constraints leads to layer hybridized and moiré excitons which can be widely engineered. This review covers fundamental aspects of IXs including correlation phenomena as well as the consequence of moiré superlattices with a strong focus on TMD homo- and hetero-bilayers. |
| title | Interlayer and moiré excitons in atomically thin double layers: from individual quantum emitters to degenerate ensembles |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2407.10713 |