High-Temperature Superconductor PbH4(H2)2 under the Pressure of 200 GPa |
| K.P. Kosk-Jonieca, I.A. Wronaa, M. Kostrzewaa, R. Szczęśniaka, b
aDivision of Theoretical Physics, Jan Długosz University in Częstochowa, al. Armii Krajowej 13/15, 42-200 Częstochowa, Poland bDivision of Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland |
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| In the paper, we analyze the thermodynamic properties of high-temperature superconducting state induced in the PbH4(H2)2 compound under the pressure of 200 GPa. We have shown that the critical temperature TC varies from 81 K to 121 K, for the Coulomb pseudopotential μ*∈⟨0.1,0.3⟩. Due to the significant retardation and strongly coupling effects, the values of other thermodynamic parameters differ significantly from the predictions of mean-field BCS theory. The results have been obtained in the self-consistent manner under the Eliashberg formalism. |
DOI:10.12693/APhysPolA.138.181 topics: Eliashberg, superconductivity, strong coupling constant, lead, BCS theory, thermodynamic properties, pressure effects |