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| Hauptverfasser: | , , , , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| Online-Zugang: | https://arxiv.org/abs/2310.14417 |
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| _version_ | 1866916286525603840 |
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| author | Saigal, Nihit Klebl, Lennart Lambers, Hendrik Bahmanyar, Sina Antić, Veljko Kennes, Dante M. Wehling, Tim O. Wurstbauer, Ursula |
| author_facet | Saigal, Nihit Klebl, Lennart Lambers, Hendrik Bahmanyar, Sina Antić, Veljko Kennes, Dante M. Wehling, Tim O. Wurstbauer, Ursula |
| contents | We establish low-temperature resonant inelastic light scattering (RILS) spectroscopy as a tool to probe the formation of a series of moiré-bands in twisted WSe_{2} bilayers by accessing collective intermoiré-band excitations (IMBE). We observe resonances in RILS spectra at energies in agreement with inter-moiré band transitions obtained from an ab-initio based continuum model. Transitions between the first and second inter-moiré band for a twist angle of about 8° are reported and between first and second, third and higher bands for a twist of about 3°. The signatures from IMBE for the latter highlight a strong departure from parabolic bands with flat minibands exhibiting very high density of states in accord with theory. These observations allow to quantify the transition energies at the K-point where the states relevant for correlation physics are hosted. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_14417 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Collective charge excitations between moiré-minibands in twisted WSe2 bilayers from resonant inelastic light scattering Saigal, Nihit Klebl, Lennart Lambers, Hendrik Bahmanyar, Sina Antić, Veljko Kennes, Dante M. Wehling, Tim O. Wurstbauer, Ursula Strongly Correlated Electrons We establish low-temperature resonant inelastic light scattering (RILS) spectroscopy as a tool to probe the formation of a series of moiré-bands in twisted WSe_{2} bilayers by accessing collective intermoiré-band excitations (IMBE). We observe resonances in RILS spectra at energies in agreement with inter-moiré band transitions obtained from an ab-initio based continuum model. Transitions between the first and second inter-moiré band for a twist angle of about 8° are reported and between first and second, third and higher bands for a twist of about 3°. The signatures from IMBE for the latter highlight a strong departure from parabolic bands with flat minibands exhibiting very high density of states in accord with theory. These observations allow to quantify the transition energies at the K-point where the states relevant for correlation physics are hosted. |
| title | Collective charge excitations between moiré-minibands in twisted WSe2 bilayers from resonant inelastic light scattering |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2310.14417 |