Pressure-induced superconductivity in the fcc phase of lithium: Strong-coupling approach

R. Szczȩśniak, M. W. Jarosik, D. Szczȩśniak

    Research output: Contribution to journalReview article

    36 Citations (Scopus)

    Abstract

    The thermodynamic properties of the superconducting state in the fcc phase of lithium for the pressure (p) values 22.3 and 29.7 GPa have been determined by using the semi-phenomenological Eliashberg model. It has been shown, that the critical value of the Coulomb pseudopotential increases with p from 0.22 to 0.36. The values of the dimensionless ratios 2Δ(0)/kBTC and ΔC(TC)/CN(TC) are higher than in the BCS theory and grow together with p. In contrast, the ratio TCCN(TC)/HC2(0) is smaller than in the BCS model and decreases with hydrostatic pressure's increasing. The Superconductors; Thermodynamic properties. numerical results have been supplemented by the analytical formula, which describes the dependence of the critical temperature on p in the considered pressure region.

    Original languageEnglish
    Pages (from-to)4897-4902
    Number of pages6
    JournalPhysica B: Condensed Matter
    Volume405
    Issue number24
    DOIs
    Publication statusPublished - 15 Dec 2010

    Keywords

    • Superconductors
    • Thermodynamic properties

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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