fig8

Figure 8. Temperature dependence of the MSRD factors, determined through RMC/EA calculations for nearest Sb (Bi)-Te, Sb(Bi)-Sb(Bi), and Te-Te atom pairs in Sb₂Te₃ (D-F) and Bi₂Te₃ (G-I). Corresponding atom pairs are highlighted in panels (A-C). The solid lines represent fits using the correlated Einstein model, with the exclusion of data points at 300 K. Corresponding effective force constants (f) are also indicated.