Thermodynamic parameters of Zr superconductor at ω-β structural phase transition

R. Szczȩśniak, A. P. Durajski, D. Szczȩśniak

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2 Citations (Scopus)


In the present study, the thermodynamic parameters of the superconducting state in zirconium at the structural ω-β phase transition (~30 GPa) have been calculated. It has been shown that the jump of the critical temperature (TC) from 4.2 to 11 K corresponds to the jump of the Coulomb pseudopotential from 0.26 to 0.41. Other thermodynamic quantities, such as the order parameter at zero Kelvin (Δ(0)), the specific heat jump (ΔC(TC)), and the thermodynamic critical field (HC(0)) also undergo the abrupt change. The dimensionless parameters: RΔ≡2 Δ(0)/ kB TC, RC≡ ΔC(TC)/ CN(TC) and RH≡ TCCN(TC)/ H2 C(0) are equal to the following: RΔ ε {3.62, 4.27} RC ε {1.63, 2.01}, and RH ε {0.167, 0.139}, respectively. Additionally, the structural phase transition induces the strong variation of the ratio of the electron effective mass to the electron band mass: m* e/ meε{1.84, 2.98}. From the physical point of view, the increasing deviations of the superconducting parameters from the predictions of the BCS theory at the structural ω-β phase transition have tight relation with the corresponding behavior of the electron-phonon coupling.

Original languageEnglish
Pages (from-to)538-544
Number of pages7
JournalPhysica Status Solidi (B) Basic Research
Issue number3
Publication statusPublished - 1 Mar 2016
Externally publishedYes



  • Structural phase transition
  • Thermodynamic properties
  • Zr superconductor

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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