Correlation between superconducting transition temperatures and physical properties*

We analyze the correlation between the superconducting transition temperatures and the physical properties in the normal state, extending the previous work by Hirsch[1]. Several classes of superconductors, including the elemental superconductors, the A15 compounds and the hydrides etc, are studied and analyzed. We identify the properties that correlate with T_c in each class of superconductors. In particular, the correlation between the metallic covalent bonding and the superconducting transition temperatures is strong, which suggests a possible route for finding new high temperature superconductors by high throughput search for compounds with strong metallic covalent bonds.
[1] J. E. Hirsch Phys. Rev. B 55, 9007