Can buckling account for the features seen in graphite's Raman spectra?

الأصل · EN

Raman scattering data were collected on graphite monochromator. Spectra were interpreted in terms of the space group P6₃mc, a subgroup of space group P6₃/mmc. The latter has commonly been used for the interpretation of Raman scattering data. Space group P6₃mc corresponds to the buckling of graphene sheets and is consistent with many spectral features. Both the first and second order scattering were considered. Many first order results (most notably the assignments of the band at 1350 and the peak at 1620 cm⁻¹) were found to agree with previous observations [Y. Kawashima and G. Katagiri, Phys. Rev. B 66, 104109 (2002)] carried out on highly oriented pyrolytic graphite samples. To check the consistency of the model, symmetry analysis was applied to the second order spectra. Also a simple test for buckling model was done.