Normal State of the Metallic Hydrogen Sulfide

TL;DR

This paper uses a generalized electron-phonon theory to analyze the normal electronic properties of hydrogen sulfide phases under high pressure, revealing detailed self-energy and density of states characteristics.

Contribution

It provides a comprehensive theoretical analysis of the normal state properties of SH3 and SH2 hydrogen sulfide phases at various high pressures, including frequency-dependent self-energy and density of states calculations.

Findings

Frequency dependence of electron self-energy calculated

Renormalized density of states analyzed

Pressure effects on electronic properties examined

Abstract

Generalized theory of the normal properties of the metal in the case of the electron-phonon (EP) systems with not constant density of electronic states is used to examine the normal state of the SH3 and SH2 phase of the hydrogen sulfide at different pressures. The frequency dependence of the real and imaginary part of the self-energy part (SP) of the electron Green's function, the real and imaginary part of the complex renormalization of the electron mass, the real and imaginary part of the complex renormalization of the chemical potential, as well as the renormalized with the strong electron-phonon interaction the electron density of states are calculated. The calculations are performed for the stable orthorhombic IM-3M hydrogen sulfide SH3 structure at three pressures P = 170 GPa, P = 180 GPa, P = 225 GPa and SH2 structure with the symmetry I4/MMM (D4H-17) for the three values of pressure P = 150 GPa , P = 180 GPa, P = 225 GPa at the temperature of T = 200K. Key words: hydrogen sulfide, electron-phonon system, the pressure, the electronic properties.