Pressure-induced superconductivity in the fcc phase of lithium

Strong-coupling approach

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

Research output: Contribution to journalArticle

35 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
Externally publishedYes

Fingerprint

Superconductivity
Lithium
Thermodynamic properties
superconductivity
thermodynamic properties
lithium
BCS theory
Hydrostatic pressure
hydrostatic pressure
Superconducting materials
pseudopotentials
critical temperature
Temperature

Keywords

  • Superconductors
  • Thermodynamic properties

ASJC Scopus subject areas

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

Cite this

Pressure-induced superconductivity in the fcc phase of lithium : Strong-coupling approach. / Szczȩśniak, R.; Jarosik, M. W.; Szczȩśniak, D.

In: Physica B: Condensed Matter, Vol. 405, No. 24, 15.12.2010, p. 4897-4902.

Research output: Contribution to journalArticle

Szczȩśniak, R. ; Jarosik, M. W. ; Szczȩśniak, D. / Pressure-induced superconductivity in the fcc phase of lithium : Strong-coupling approach. In: Physica B: Condensed Matter. 2010 ; Vol. 405, No. 24. pp. 4897-4902.
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