Electronic Raman Scattering in Twistronic Few-Layer Graphene
Artikel i vetenskaplig tidskrift, 2020

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.

Författare

Aitor Garcia-Ruiz

National Graphene Institute

University of Bath

Joshua Thompson

Chalmers, Fysik, Kondenserad materie- och materialteori

University of Bath

Marcin Mucha-Kruczyński

University of Bath

Vladimir Fal'ko

National Graphene Institute

University of Manchester

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 125 197401

Styrkeområden

Materialvetenskap

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1103/PhysRevLett.125.197401

PubMed

33216571

Mer information

Senast uppdaterat

2020-12-28