Study of the superconducting state in the Cmmm phase of GeH4 compound

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

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10 Citations (Scopus)

Abstract

The superconducting state, that gets induced in the Gel-I4 compound under the pressure at 20 GPa, is characterized by the high critical temperature Tc(μ *)ε(54.5,31.2) K, where μ * is the Coulomb pseudo- potential, and μ * ε(0.1 0.3). Other thermodynamic parameters for the considered range of the Coulomb pseudopotential significantly differ from the predictions of the BCS model. In particular: (i) the ratio of the energy gap to the critical temperature (Rδ.=2δ(0) kBTC) changes from 407 to 388; (ii) the value of the parameter Rc=δ(TC) CN(TC) decreases from 185 to 169, where AC denotes the specific heat jump, and CN is the specific heat of the normal state; (iii) the ratio RHE TCCN(TC) H(0) increases from 0147 to 0155; IIc represents the thermodynamic critical field.

Original languageEnglish
Pages (from-to)39-44
Number of pages6
JournalSolid State Communications
Volume165
DOIs
Publication statusPublished - 2013
Externally publishedYes

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Keywords

  • A. Hydrogen-rich compound
  • A. Superconductivity
  • D. High-pressure effects
  • D. Thermodynamic properties

ASJC Scopus subject areas

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

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