Electronic Raman Scattering in Twistronic Few-Layer Graphene.
Phys Rev Lett
; 125(19): 197401, 2020 Nov 06.
Article
de En
| MEDLINE
| ID: mdl-33216571
ABSTRACT
We study electronic contribution to the Raman scattering signals of two-, three- and four-layer graphene with layers at one of the interfaces twisted by a small angle with respect to each other. We find that the Raman spectra of these systems feature two peaks produced by van Hove singularities in moiré minibands of twistronic graphene, one related to direct hybridization of the Dirac states, and the other resulting from band folding caused by moiré superlattice. The positions of both peaks strongly depend on the twist angle, so that their detection can be used for noninvasive characterization of the twist, even in hBN-encapsulated structures.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
Phys Rev Lett
Année:
2020
Type de document:
Article
Pays d'affiliation:
Royaume-Uni