Collective charge excitations between moir\'e-minibands in twisted WSe2 bilayers from resonant inelastic light scattering
| Autor: | Saigal, Nihit, Klebl, Lennart, Lambers, Hendrik, Bahmanyar, Sina, Antić, Veljko, Kennes, Dante M., Wehling, Tim O., Wurstbauer, Ursula |
|---|---|
| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We establish low-temperature resonant inelastic light scattering (RILS) spectroscopy as a tool to probe the formation of a series of moir\'e-bands in twisted WSe_{2} bilayers by accessing collective intermoir\'e-band excitations (IMBE). We observe resonances in RILS spectra at energies in agreement with inter-moir\'e band transitions obtained from an ab-initio based continuum model. Transitions between the first and second inter-moir\'e band for a twist angle of about 8{\deg} are reported and between first and second, third and higher bands for a twist of about 3{\deg}. 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. Comment: 6 pages, 3 figures and SI with 12 pages and 8 SI figures |
| Databáze: | arXiv |
| Externí odkaz: |
|