Maximum in the temperature dependence of the critical current in bulk random Josephson networks
Gantmakher V.F., Teplinskii V.M., Zverev V.N.
Superconducting properties of the metastable alloy Zn—Sb were studied in a set of intermediate states of a bulk sample during its transformation toward the insulating state. When the temperature reduces below the transition, the critical current rises till 0.7 Tc, then drops and finally reaches the limiting value. The latter scales with the normal resistance of the sample as Я^2, whereas in the maximum at 0.7 Tc the scaling power is different, B„3'J. Comparison with properties of small superconducting tunnel junctions is made.