Thermodynamics of the hydrogen dominant potassium hydride superconductor at high pressure

D. Szczęs̈niak, R. Szczęs̈niak

Research output: Contribution to journalArticle

4 Citations (Scopus)


In the present paper we report comprehensive analysis of the thermodynamic properties of novel hydrogen dominant potassium hydride superconductor (KH6). Our computations are conducted within the Eliashberg theory which yields quantitative estimations of the most important thermodynamic properties of superconducting phase. In particular, we observe that together with the increasing pressure all the thermodynamic properties decrease, e.g. TC 72.91,55.50 K for p 166,300 GPa. It is predicted that such decreasing behavior corresponds to the decreasing hydrogen lattice molecularization with increasing pressure value. Furthermore, by calculating the dimensionless thermodynamic ratios, familiar in the Bardeen-Cooper-Schrieffer (BCS) theory, it is proved that KH6 material is a strong-coupling superconductor and cannot be quantitatively described within the BCS theory.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalSolid State Communications
Publication statusPublished - 1 Jun 2015


  • A. Superconductors
  • D. High-pressure effects
  • D. Thermodynamic properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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