Vapor-liquid (insulator-metal) phase transition in alkali metal vapors

2015

J. Exp. Theor. Phys.

Self Cite

We propose a simple physical model describing the transition of an exciton gas to a conducting exciton liquid. The transition occurs due to cohesive coupling of excitons in the vicinity of the critical point, which is associated with transformation of the exciton ground state to the conduction band and the emer gence of conduction electrons. We calculate the cohesion binding energy for the exciton gas and, using it, derive the equations of state, critical parameters, and binodal. The computational method is analogous to that used by us earlier [5] for predicting the vapor-liquid (insulator-metal) phase transition in atomic (hypothet ical, free of molecules) hydrogen and alkali metal vapors. The similarity of the methods used for hydrogen and excitons makes it possible to clarify the physical nature of the transition in the exciton gas and to predict more confidently the existence of a new phase transition in atomic hydrogen.

“…Such a state can indeed be referred to as a gas eous metal). These arguments also apply to atomic hydrogen [5] and alkali metal vapors considered ear lier [6].…”

Section: P P Ig P Hs P Int mentioning

confidence: 91%

Section: Thermodynamic Functionsmentioning

confidence: 99%

Section: Thermodynamic Functionsmentioning

confidence: 99%

“…The last term on the right hand side of expression (6) describes the effect of collective attraction of excitons due to cohesion.…”

Section: Thermodynamic Functionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Physical model of the vapor-liquid (insulator-metal) transition in an exciton gas

2015

J. Exp. Theor. Phys.

Self Cite

Features of the Vapor‐Liquid (dielectric‐metal) Phase Transition in Metal Vapors, Semiconductors and Rare Gases

2016

Contrib. Plasma Phys.

A new method for the calculation of the critical point parameters and binodal of vapor‐liquid (dielectric‐metal) phase transition is suggested. It is based on the hypothesis that cohesion, which defines the main properties of solid state, also determines the properties in the vicinity of the critical point. Comparison with experimental and theoretical data available for metals, semiconductors and rare gases is made. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Equation of state and transport properties of metals in warm dense matter regime

Contributions to Plasma Physics

2017

The equation of state, composition, and electrical conductivity are calculated for the supercritical ionized fluid of aluminium. For calculation, we used the previously proposed chemical plasma model called “3+”‐component. The model includes atoms, immersed in jellium, and thermal electrons and ions. Part of the bound states electron density is referred to as jellium. The density of electron jellium increases with the compression of atomic gas and does not depend on temperature directly. The emergence of jellium can be termed the process of ionization in the full sense of the word. The conductivity of dense vapours is determined by the sum of the conductivity of the thermal electrons, calculated according to the Frost formula, and the conductivity of jellium, calculated according to the Regel–Ioffe formula. At compression, the electrical conductivity passes through the minimum from the conductivity of thermal electrons to the conductivity of electrons of jellium accordingly. Calculations of the equation of state and the electrical conductivity of supercritical metal vapours agree well with physical and numerical experimental data.