Revisiting metallization boundary of warm dense helium in a wide ρ-T regime from ab initio study

  title={Revisiting metallization boundary of warm dense helium in a wide $\rho$-T regime from ab initio study},
  author={Wei Zhang and Zhi-Guo Li and Zhijian Fu and Jiayu Dai and Qi-Feng Chen and Ling-Cang Cai},
  journal={Scientific Reports},
The knowledge of the metallization of warm dense helium has important implications for understanding the thermal histories, stellar structure and magnetic field environment of giant planets. However, it is also a pendent scientific topic. For a revisiting into the properties of warm dense helium, we performed extensive quantum Langevin molecular dynamic simulations and electronic structure calculations to study helium over a very wide range of density (ρ = 1~24 g/cm3) and temperature (T = 10… 

Metallization of dense fluid helium from ab initio simulations

We examine the metallization of fluid helium with molecular dynamics simulations based on density functional theory. The insulator-to-metal transition is studied at densities between 1 and

Equation of state and optical properties of warm dense helium

We used molecular dynamics simulations based on density functional theory to study the thermophysical properties of warm dense helium. The influence of different exchange-correlation (XC) functionals

Second-shocked Hugoniot state of warm dense 6LiD: Quantum molecular dynamics simulations

We use quantum molecular dynamics to systematically study the equation of state of 6LiD in the density range 1.76 to 3.68 g/cm3. The calculations involve the self-consistent determination of (a) the

Transport properties of warm dense neon and krypton at high pressures.

The transport properties of warm dense neon and krypton are studied by combining self-consistent fluid variational theory (SFVT) with linear response theory (LRT) and an effective potential model in combination with the Muffin-tin model is introduced.

Nonmetal‐to‐metal transition in dense fluid helium

The nonmetal‐to‐metal transition in dense fluid helium is discussed, which has been, in analogy to metallization of hydrogen, predicted as first‐order plasma phase transition using chemical models

Risk Factors and Prevention of Viral Hepatitis-Related Hepatocellular Carcinoma

Eliminating the route of transmission and vaccination will lead to a decrease in the incidence of HCC, and tertiary prevention is actively treating HCC to prevent its recurrence.



Fluid helium at conditions of giant planetary interiors

As the second most-abundant chemical element in the universe, helium makes up a large fraction of giant gaseous planets, including Jupiter, Saturn, and most extrasolar planets discovered to date.

Electron-phonon coupling and the metallization of solid helium at terapascal pressures.

It is found that an accurate description of electron-phonon coupling requires us to use a nonperturbative approach and the calculated metallization pressure for the cooling of white dwarfs is larger than found previously.

First-principles studies of the metallization and the equation of state of solid helium.

The insulator-to-metal transition in hcp solid helium at high pressure is studied with first-principles simulations, and the metallization density derived from GW calculations is found to be in very close agreement with DMC predictions.

Metallization of fluid nitrogen and the mott transition in highly compressed low-Z fluids.

The density dependences of electrical conductivities in the semiconducting fluid are well correlated with the radial extent of the electronic charge-density distributions of H, N, O, Cs, and Rb atoms.

Equation of state and optical properties of warm dense helium

We investigate the physical properties of warm dense helium under the conditions found in the atmospheres of cool white dwarfs using both a chemical model and ab initio simulations. A chemical model

Direct observation of an abrupt insulator-to-metal transition in dense liquid deuterium

Driving liquid deuterium into metal Quick and powerful compression can force materials to change their properties dramatically. Knudson et al. compressed liquid deuterium to extreme temperatures and

Free-energy model for fluid helium at high density.

The characterization of the helium phase diagram bears important consequences for the thermodynamic, magnetic, and transport properties of cool and dense astrophysical objects, among which are the solar and the numerous recently discovered extrasolar giant planets.

Insulator-to-conducting transition in dense fluid helium.

By combining diamond-anvil-cell and laser-driven shock wave techniques, dense He samples up to 1.5 g/cm(3) at temperatures reaching 60 kK provide a benchmark to test models that describe He ionization at conditions found in astrophysical objects, such as cold white dwarf atmospheres.

Dynamic ionic clusters with flowing electron bubbles from warm to hot dense iron along the Hugoniot curve.

With the inclusion of complicated features in quantum Langevin molecular dynamics, the present equation of states could serve as a first-principles based database in a wide range of temperatures and densities.

The Boltzmann Equation in the Theory of Electrical Conduction in Metals

The motion of conduction electrons in a metal in an electric field, scattered by an irregular static potential, is considered; this model is applicable to the resistance due to lattice waves at high