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Choice of Pseudopotential and Electroresistance of Simple Disordered Metals

100%
Shvets V., Belov E.
Acta Physica Polonica A
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1999
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vol. 96
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issue 6
741-750
EN
An expression is investigated for inverse relaxation time for electroconductivity in the simple disordered metals within a framework of a kinetic equation method and a perturbation theory by the powers of a pseudopotential of electron-ion interaction. Numerical calculation of the third-order term by a pseudopotential for inverse relaxation time of 25 simple disordered metals is carried out. Three different model local pseudopotentials are used. Strong relation of the results of calculation between the choice of a model pseudopotential and concrete values of the pseudopotential parameters is found out for all metals. Selection criterions for the model pseudopotentials are formulated.
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Metal-Dielectric Transition in Hydrogen

100%
Shvets V., Vlasenko A.
Acta Physica Polonica A
|
2008
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vol. 114
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issue 4
851-858
EN
The electrical resistivity of liquid metallic hydrogen at a temperature of 3000 K and a density of 0.35 mol/cm^3 is calculated. Hydrogen is considered as a three-component system consisting of electrons, protons, and neutral hydrogen atoms. The second order of perturbation theory in electron-proton and electron-atom interactions is used to determine the inverse relaxation time for electric conductivity. The Coulomb electron-electron interaction is taken into account in the random phase approximation and the exchange interaction and correlation of conductivity electrons are included in the local-field approximation. The model of hard spheres is used for the proton and atomic subsystems. The concentration of the electrically neutral atomic component proved to be significantly lower than the value assumed by the discoverers of metallic hydrogen.
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