Thermodynamics of the hydrogen dominant potassium hydride superconductor at high pressure

D. Szczęs̈niak, R. Szczęs̈niak

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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
Volume212
DOIs
Publication statusPublished - 1 Jun 2015

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potassium hydrides
Hydrides
Superconducting materials
Potassium
Hydrogen
BCS theory
Thermodynamic properties
thermodynamic properties
Thermodynamics
thermodynamics
hydrogen

Keywords

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

ASJC Scopus subject areas

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

Cite this

Thermodynamics of the hydrogen dominant potassium hydride superconductor at high pressure. / Szczęs̈niak, D.; Szczęs̈niak, R.

In: Solid State Communications, Vol. 212, 01.06.2015, p. 1-4.

Research output: Contribution to journalArticle

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