Effect of magnetic-field-induced frustration on the superconducting transition of proximity-coupled arrays

R. K. Brown; J. C. Garland

doi:10.1103/PhysRevB.33.7827

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Effect of magnetic-field-induced frustration on the superconducting transition of proximity-coupled arrays

R. K. Brown, J. C. Garland

DOI 10.1103/PhysRevB.33.7827 · Physical Review B

T1

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Abstract

The magnetic field dependence of the superconducting transition has been studied in triangular arrays of Pb-Sn proximity-coupled junctions. The transition temperature Tc and the array resistance R(T) are found to vary periodically in a perpendicular magnetic field with a period corresponding to one flux quantum per unit cell of the array. In addition, both quantities show substructure at rational fractions of a flux quantum f=ΦΦ0=14,13,12,23,34. The current-voltage characteristics of the arrays are nonlinear at temperatures near the transition temperature Tc, with voltage increasing as a power of the current V∼Ia(T,f). As a function of reduced temperature t=[Tc(f)−T]Tc(f), the power-law exponent a(t,f) is insensitive to f.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb-Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown