Enhancement of critical current and magnetic field in a defected Josephson tunneling junction

Chow, T. C.; Chou, Henry; Lai, Hung-Wei; Liu, C.C.; Gou, Y. S.

doi:10.1016/0921-4534(95)00087-9

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Variation With the Defect Position1

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“…At these distances there are no other modes for H = 0. Similar results were obtained by Chow et al [30] where they attributed this enhancement in the I max for small distances to a self-field which was generated by the current, penetrating into the defect and resisted any further penetration of field. To overcome this resistance it was necessary to apply a higher current.…”

Section: Variation With the Defect Positionsupporting

confidence: 87%

Critical currents in Josephson junctions with macroscopic defects

Stefanakis¹,

Flytzanis²

2000

Supercond. Sci. Technol.

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The critical currents in Josephson junctions of conventional superconductors with macroscopic defects are calculated for different defect critical current densities as a function of the magnetic field. We also study the evolution of the different modes with the defect position, at zero external field. We study the stability of the solutions and derive simple arguments, that could help the defect characterization. In most cases a reentrant behavior is seen, where both a maximum and a minimum current exist.

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Section: Variation With the Defect Positionsupporting

confidence: 87%