Metallic phase of hydrogen at the pressure 500GPa

TL;DR

This study uses first-principles calculations to analyze the metallic phase of hydrogen at 500 GPa, identifying a stable structure with specific lattice symmetry under high pressure.

Contribution

It provides detailed computational insights into the structural and electronic properties of metallic hydrogen at extreme pressures, highlighting a stable phase with I41/AMD symmetry.

Findings

Hydrogen adopts a stable metallic phase at 500 GPa.

The stable phase has I41/AMD lattice symmetry.

The structure is phonon spectrum stable.

Abstract

The first-principle method of mathematical modeling was used to calculate the structural, electronic, phonon, and other characteristics of the normal metallic phase of hydrogen at a pressure of 500 GPa. It has been shown that metal hydrogen having a lattice symmetry I41 / AMD cell is a stable phase under a high pressure hydrostatic compression. The resulting structure is a locally stable one with respect to the phonon spectrum.