Empirical agreement of correlation between superconducting transition temperature and solute concentration in amorphous and crystalline binary transition metal alloys: Local superconductivity?

Abstract

Abstract Auluck's [1] correlation between superconducting transition temperature T c and solute concentration x in binary, crystalline , transition metal alloys AB x is applied to amorphous , binary, transition metal alloys, as studied by Collver and Hammond [2], quite successfully. The McMillan [3] electron-phonon enhancement parameter λ and the Hopfield [4] atomic parameter η = N I 2 formally related by λ — η/ A 2 where A is the atomic number and θ is the Debye temperat ure, are shown to be similarly related in both amorphous and crystalline alloys studied here. Via the Auluck linearity in λ versus T c for both amorphous and crystalline alloys one can that further evidence for the local mechnisms of semiconductivity now exists.