Research / 2022 / Article / Fig 2

Research Article

Intralayer Phonons in Multilayer Graphene Moiré Superlattices

Figure 2

Davydov splitting of nonfolded ZO modes in and PM. (a) Raman spectra for . (b) The experimental (crosses) and calculated (circles) frequency differences () between each Davydov component and the lowest-frequency one in . (c) Schematic of PM for involving perturbation from interlayer () and interfacial () coupling. Atomic displacements and mode frequencies (in ) of Davydov components for nonfolded ZO phonons in (d) , (e) , and (f) calculated by the PM. Arrow lengths represent vibration amplitudes.