Extended Data Fig. 2: DMC phase diagram of high-pressure hydrogen.

This is an extended version of Fig. 2, where we report the enthalpies also for the static and harmonic phase-diagrams. The static lattice enthalpy is in panel a. Quasi-harmonic phase-diagram of hydrogen is reported in panel b (in panel c for deuterium). The main structures (Cmca-12, C2/c-24 and Cs-IV) are shown in all panels. In panel c, we report the quasi-harmonic phase diagram of deuterium. In panel d, we show the anharmonic (SSCHA) entalpies of hydrogen. This is the same as Fig. 2a. Anharmonic entalpies of deuterium are plotted in panel e, the same as Fig. 2b.