Fig. 1.

Thermodynamic and ultrafast kinetic phase diagram. The black lines delineate the solid–liquid and solid–solid (bcc–hcp and fcc–hcp, respectively) coexistence curves. The colored filled circles show the temperature at which nucleation of solid from the melt was observed in direct MD simulations. The color indicates the dominant solid phase, with blue equal to bcc and green equal to close packed (fcc and/or hcp). In the pressure range 40 to 70 GPa, both phases are observed. The relative green to blue content of each symbol qualitatively depicts the prevalence of the bcc to the close-packed phases.