SUPERCONDUCTING PROPERTIES OF A-15 COMPOUNDS DERIVED FROM BAND-STRUCTURE RESULTS

Calculations of the electron-phonon interaction, λ, and Tc are presented for ten different A15 compounds, V3X and Nb3X, X=Al,Ga,Si,Ge,andSn. The calculated temperature-dependent magnetic susceptibility of Nb3Sn is also shown to be in good agreement with experiment. We argue that the low-temperature anomalies in many A15 materials are related to the very sharp structure in the density of states near the Fermi energy found in our ab initio band-structure results. © 1979 The American Physical Society.