FIELD-ENHANCED SUPERCONDUCTIVITY IN DISORDERED WIRE NETWORKS

The superconducting transition was studied in Al wire networks with bu ilt-in positional disorder. Application of small transverse magnetic f ields increased the mean-field critical temperature in the disordered networks but not in the ordered networks. The magnitude of this T-c en hancement was independent of changes in bias current, probe separation , and measurement configuration, unlike the apparent T-c shifts associ ated with nonequilibrium resistance anomalies previously observed in s uperconducting microstructures. [S0163-1829(98)00926-6].