In their experimental work, Na and coworkers observed "Davydov splitting of the A-like intralayer vibration modes at ~405 cm -1 … when the excitation energy of 1.96 eV is used". The researchers analyzed the Raman spectra of 2H-MoS2 up to 6 layers. In fact, the experimental work is based on Raman spectroscopy with three excitation energies of 2.81, 2.41, and 1.96 eV, that is the "441.6 nm (2.81 eV) line of a He-Cd laser, the 514.5 nm (2.41 eV) line of an Ar ion laser, and the 632.8 nm (1.96 eV) line of a He-Ne laser" . "In the high-frequency region, the E 1 2g mode around 383 cm -1 is almost independent of the stacking type for the same thickness, but the A1g mode around 405 cm -1 varies significantly with the stacking type" . "Unlike MoTe2 or MoSe2 where the spectra of Davydov split A-like modes can be analyzed by considering only the Raman-active modes, it turns out that we need to consider both Raman-active and inactive modes to fit our data for MoS2. Also, Davydov splitting in MoS2 is clearly observed only for the 1.96 eV excitation, whereas it was seen for several excitation energies in the case of other TMDs". The split peaks given by Na and coworkers are in the range of 400-410 cm -1 . The researchers used Lorentzian functions for the decomposition of the A band.