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
moir´e minibands of twistronic graphene, one related to direct hybridization of the Dirac states, and the
other resulting from band folding caused by moir´e 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

University of Bath

National Graphene Institute

Joshua Thompson

Chalmers, Fysik, Kondenserad materie- och materialteori

University of Bath

Marcin Mucha-Kruczyński

University of Bath

Vladimir Fal'ko

University of Manchester

National Graphene Institute

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

Mer information

Senast uppdaterat

2020-12-02