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Flux nucleation in Josephson junctions formed by touching lead pieces

John E. Drumheller, Z. Trybula, Jan Stankowski

DOI 10.1103/PhysRevB.41.4743 · Physical Review B

T1

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Abstract

Microwave-stimulated flux nucleation has been observed in an artifical superconducting loop with Josephson junctions formed by pressing lead pieces together. A regular series of microwave absorption lines similar to those seen in niobium, indium, and single crystals of Y-Ba-Cu-O is obtained. The separation of the first derivative of the absorption lines indicates a band of microwave absorption that is proportional to the square root of the microwave power and has a definite threshold power. A simple model based on that of Silver and Zimmerman is used to explain the data. A superconducting path with two weak links is assumed with flux entering the junction when microwaves drive the junction normal.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
Pb

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—Pressure not reportedunknown
YBa2Cu3O7-δ

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—Pressure not reportedunknown
Nb

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—Pressure not reportedunknown
In

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

—Pressure not reportedunknown

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