Intralayer Phonons in Multilayer Graphene Moiré Superlattices
Davydov components of mZO modes in . Raman spectra of mZO modes in (a) and (b) in comparison with . (c) The dispersion of ZO phonon branch in 2LG and 1LG. The experimental (Exp.) frequency differences (open circles) between each Davydov component and the lowest-frequency one () of mZO modes in (d) and (e) , along with the calculated results from PM (dashed lines). Atomic displacements of (f) the highest-frequency mZO in and (g) the corresponding unfolded ZO() in 3LG. Color codes are based on the amplitudes of atomic displacements.