Szczegóły publikacji
Opis bibliograficzny
Formation of cavity resonance states in twisted bilayer graphene / Tomasz CHWIEJ // Physica. E, Low-Dimensional Systems & Nanostructures ; ISSN 1386-9477. — 2022 — vol. 141 art. no. 115219, s. 1–12. — Bibliogr. s. 12, Abstr. — Publikacja dostępna online od: 2022-03-17
Autor
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 139822 |
|---|---|
| Data dodania do BaDAP | 2022-04-13 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.physe.2022.115219 |
| Rok publikacji | 2022 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physica, E, Low Dimensional Systems & Nanostructures |
Abstract
Twisted bilayer graphene belong to van der Waals two-dimensional materials that demonstrate low-energy relativistic gapless dispersion relation. Although carries can not be permanently confined within electrostatically formed cavity for this reason (in pristine condition), we show that transitory states with lifetimes up to several microseconds may exist for twist angle θ=1.050 while changing the twist towards θ=0.50 lowers the lifetimes by few orders of magnitude. Generally, these resonances occur in density of states spectra grouped in small bunches which positions in energy depend on the magnitude of cavity's confinement potential. Analysis of local density of states corresponding to transitory states reveals that sequence of excitations in each bunch can have ascending as well as descending character. Moreover, density develop the superstructure composed of small density spots or closed-loops centered at AA sites and the overall superstructure may mimic the rotational symmetry of cavity or C6 symmetry for higher excitations, even though all of them actually have C3 symmetry inherited from underlying TBLG Moiré lattice.
