Figure 7
Frequency evolution trends of interlayer shear modes with largest Raman intensity in (a) MoS2, (b) WSe2, (c) MoSe2 and (d) Bi2Se3 with different stacking orders.
The LDA calculated data are plotted with solid dots and the experimental data are shown in empty dots. The gray and indigo lines result from fitting of the largest frequency shear modes (SN-1) and the lowest frequency shear modes (S1) for AB and ABC stacking order, respectively, using the linear chain model12. The resulting force constants are shown in Table S10.
