Isotropic and anisotropic description of superconducting state in CaC6 compound

R. Szczȩśniak, E. A. Drzazga, D. Szczȩśniak

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3 Citations (Scopus)

Abstract

The thermodynamic parameters of the superconducting state in CaC6 have been determined in the framework of the isotropic and anisotropic Eliashberg formalism. The obtained results determine the anisotropy effect on the values of the thermodynamic functions. In particular, it has been found that the anisotropy of the electron-phonon coupling constant and the Coulomb pseudopotential significantly affects the order parameter and the wave function renormalization factor, which determines the electron effective mass. These results mean that anisotropy should be also visible in the total normalized density of states. In the case of the thermodynamic critical field, anisotropy lowers its value in the low-temperature area. On the other hand, it does not affect the specific heat jump at the critical temperature.

Original languageEnglish
JournalEuropean Physical Journal B
Volume88
Issue number2
DOIs
Publication statusPublished - 2015
Externally publishedYes

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Keywords

  • Solid State and Materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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