Materials at high pressures and temperatures are of great interest for planetary science and
astrophysics, warm dense-matter physics and inertial confinement fusion research …

High-pressure transitions are thought to modify hydrogen molecules to a molecular metallic
solid and finally to an atomic metal, which is predicted to have exotic physical properties and …

abstract Hydrogen and helium are known to play crucial roles in geological and
astrophysical environments; however, they are inert toward each other across wide pressure …

Through a series of x-ray diffraction, optical spectroscopy diamond anvil cell experiments,
combined with density functional theory calculations, we explore the dense CH 4-H 2 …

Brillouin scattering spectroscopy has been used to obtain an accurate (< 1%) ρ-P equation
of state (EOS) of 1: 1 and 9: 1 H 2-He molar mixtures from 0.5 to 5.4 GPa at 296 K. Our …

A wide band gap is one of the essential requirements for metal iodates to be used as
nonlinear optical materials. Usually, the band gap of these materials decreases under the …

The structural diversity of hydrogen under high pressure is crucial for understanding its
physical properties, especially for the superconductivity. Here, a combination of crystal …

By combining hydrogen and sulfur within diamond-anvil cells we synthesize (H 2 S) 2 H 2 at
5 GPa and 373 K. Through a series of Raman spectroscopy, infrared spectroscopy, and …

We employ first-principles molecular dynamics simulations to provide equation-of-state data,
pair distribution functions (PDFs), diffusion coefficients, and band gaps of a mixture of …

Despite extensive experimental and theoretical work, consensus on the crystal structure and
stability of the helium-hydrogen system is lacking. In this study, we investigate the possibility …