“…We have shown earlier [42] that dicates that the effects of incipient localization dominate the temperature dependence of resistivity in all these alloys. Some arguments [40,41,42] in support of this claim are: (1) very short electronic mean free paths, (2) a broad composition range showing a semiconducting resistivity behaviour, [19,22]. As already noted [19], such low T c s, comparable to these in amorphous Hf 1−x Cu x alloys [43], are unusual considering rather high contents of Nb (pure Nb has T c = 9.2 K), Zr and Ti which form alloys with T c s around 10 K, but are consistent with the results for amorphous Nb-Zr films which showed no superconductivity down to T = 1 K. The monotonic decrease of T c with x in our and all other TE 1−x TL x amorphous alloys (e.g., [43,45,46]) can be simply explained in terms of their electronic structures.…”