Metal hydrogen sulfide critical temperature at the pressure 225 gpa

TL;DR

This study applies generalized Eliashberg theory to hydrogen sulfide under 225 GPa pressure, calculating its critical temperature and electronic properties considering variable density of states and phonon interactions.

Contribution

It extends Eliashberg theory to include variable electronic density of states and phonon effects for hydrogen sulfide at high pressure, providing detailed electronic and superconducting properties.

Findings

Critical temperature at 225 GPa determined

Frequency dependence of the order parameter calculated

Electronic density of states renormalized by electron-phonon interaction

Abstract

\'Eliashberg theory, being generalized to the electron-phonon (EP) systems with not constant density of electronic states, as well as to the frequency behavior of the renormalization of both the electron mass and the chemical potential, is used to study hydrogen sulphide phase under pressure. The phonon contribution to the anomalous electron Green's function (GF) is considered. The pairing is considered within the overall width of the electron band, and not only in a narrow layer at the Fermi surface. The frequency and the temperature dependences of the electron mass renormalization ReZ , the density of electronic states , renormalized by the EP interaction , the spectral function of the electron-phonon interaction, obtained by calculation are used to calculate the electronic abnormal GF. The \'Eliashberg generalized equations with the variable density of electronic states are resolved. The dependence of both the real and the imaginary part of the order parameter on the frequency in the phase is obtained. The value in the hydrogen sulfide phase at the pressure P = 225 GPa has been defined.