Towards the same line of liquid-liquid phase transition of dense hydrogen from various theoretical predictions

Abstract

For a long time, there have been huge discrepancies between different models and experiments concerning the liquid-liquid phase transition (LLPT) in dense hydrogen. In this work, we present the results of extensive calculations of the LLPT in dense hydrogen using the most expensive first-principle path-integral molecular dynamics simulations available. The nonlocal density functional rVV10 and hybrid functional PBE0 are used to improve the description of the electronic structure of hydrogen. Of all the density functional theory calculations available, we report the most consistent results through quantum Monte Carlo simulations and coupled electron-ion Monte Carlo simulations of the LLPT in dense hydrogen. The critical point of the first-order LLPT is estimated above 2000 K according to the equation of state. Moreover, the metallization pressure obtained from the jump of dc electrical conductivity almost coincides with the plateau of equation of state.

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• Influence of finite temperature Exchange-Correlation effects in Hydrogen
• Fully Consistent Density Functional Theory Determination of the Insulator-Metal Transition Boundary in Warm Dense Hydrogen
• Theoretical evidence of H-He demixing under Jupiter and Saturn conditions
• Electronic energy gap closure and metal-insulator transition in dense liquid hydrogen
• Isotope quantum effects in the metallization transition in liquid hydrogen
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• Reduced Ionic Diffusion by the Dynamic Electron-Ion Collisions in Warm Dense Hydrogen
• A Denser Hydrogen Inferred from First-Principles Simulations Challenges Jupiter's Interior Models