Low-field magnetoresistance in granular Pb films near the insulator-superconductor transition

R. P. Barber, Jr.; R. C. Dynes

doi:10.1103/PhysRevB.48.10618

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Low-field magnetoresistance in granular Pb films near the insulator-superconductor transition

R. P. Barber, Jr., R. C. Dynes

DOI 10.1103/PhysRevB.48.10618 · Physical Review B

T1

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Abstract

We have studied the insulator-superconductor transition in quench-condensed granular Pb films from 0.1 to 10 K. Resistance measurements were made in zero magnetic field and low noise conditions. Magnetoresistance measurements were also performed for low magnetic fields (less than 100 G). The magnetoresistance results on the superconducting side of the transition suggest that we are directly probing the finite length scales associated with the range of phase coherence in these granular materials.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7.2	Pressure not reported	onset
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown