Влияние концентрации водорода на удельное электрическое сопротивление циркония: расчеты из первых принципов

Abstract

We present a first-principles study of the electron-phonon coupling and temperature dependence of intrinsic electrical resistivity in zirconium-hydrogen system with various concentration of hydrogen. By means of density functional theory and density functional perturbation theory, the Eliashberg function, Eliashberg transport function and their strength electron-phonon coupling constant λ and transport constant λtr were calculated. By solving Boltzmann equation in the lowest-order variational approximation, we got the temperature dependence of intrinsic electrical resistivity. We show that the tetragonal lattice distortion of FCC lattice leads to the formation of zirconium hydride with a weaker electron-phonon interaction, which, in turn, leads to the decrease in the electrical resistivity.operation.