Figure 2
From: Raman scattering and anomalous Stokes–anti-Stokes ratio in MoTe2 atomic layers
(a) Phonon dispersion of bilayer MoTe2 calculated with density functional theory (DFT). (b) Atomic displacements of the six prototypical TMDC Γ point optical phonons. The arrows between (a,b) connect the calculated Γ point optical phonons with the names we use to identify the lattice vibrations. (c) Experimental Raman spectra for all six phonon branches in 1L to 5L MoTe2; the spectra have been vertically shifted for clarity. The black dashed curves are guides to the eye. The small peaks in the 2nd panel (*) are the shear mode peaks shown in more detail in the 1st panel.
