Fig. 3: Phase diagram of stability.
p–T phase diagram of stability based on the lowest-energy phonon mode at K. The markers correspond to the data points reported in Table 1 and the color profile is obtained by a cubic spline interpolation. Solid lines indicate the contour lines at positive integer frequencies ℏωK (in meV), and the dashed lines the isochores. The star marks the p–T set for the ME calculation discussed in the main text. The corresponding dispersions are shown in Supplementary Fig. 3.
