Figure 4: Vibrational properties of ReS2 and Raman spectra.
From: Monolayer behaviour in bulk ReS2 due to electronic and vibrational decoupling
(a) Calculated phonon dispersion for monolayer ReS2. The phonon dispersion of bulk ReS2 (Supplementary Fig. 6) remains nearly identical to that of monolayer. (b) Raman spectrum measured on a monolayer ReS2. (c) Raman spectrum taken on bulk (blue) and monolayer (red) ReS2. (d) Same on MoS2. The Raman spectrum of ReS2 shows no thickness dependence, whereas the MoS2 in-plane (E2g) and out-of-plane (A1g) peaks are highly sensitive to the number of layers.
