Fig. 1
From: Lattice Dynamics of the Rhenium and Technetium Dichalcogenides
The Raman spectra of thick a ReSe2 and b ReS2 flakes on a SiO2/silicon substrate at room temperature; the red arrows link the peaks in the two materials corresponding to three phonon modes of significance for the present discussion. The insets show the the sample flakes used; the circles show the areas sampled and the bars indicate a scale of 20 μm