The critical temperature of superconductor and its electronic specific heat

TL;DR

This paper explores the relationship between the critical temperature of superconductors and their electronic properties, specifically the Fermi energy, highlighting differences between I-type and II-type superconductors, including high-temperature ceramics.

Contribution

It establishes a connection between critical temperature and Fermi energy for I-type superconductors and discusses variations for II-type superconductors, including high-temperature ceramics.

Findings

Critical temperature relates to Fermi energy in I-type superconductors.

Different relations are observed for II-type superconductors.

High-temperature ceramics include both I and II-type superconductors.

Abstract

It is shown that the critical temperature of the superconductor is related to the Sommerfeld constant, i.e. it is determined by the Fermi energy for I-type superconductors. The estimation of properties of II-type superconductors reveals a somewhat different relation of critical temperature and Fermi energy. Among the high-temperature superconducting ceramics there are the both - I and II - types superconductors.