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Schwidtal, K.; Finnegan, R.D.

doi:10.1103/physrevb.2.148

Cited by 28 publications

(4 citation statements)

References 22 publications

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“…An improvement of the stability of Pb-Pb,O,-Pb Josephson tunnel junctions against ageing at room temperature was achieved by Schroen [4] using plasma-oxidation for the production of the Pb,O, layer. But with the same technique Schwidtal and Pinnigan [5] did not obtain Pb-Pb,O,-Pb tunnel junctions stable a t room temperature.…”

Section: Introductionmentioning

confidence: 90%

V–VxOy–Pb Josephson tunnel junctions of high stability

Seifarth¹,

Rentsch²

1973

Phys. Stat. Sol. (a)

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Investigations are made on VVxOy–Pb Josephson junctions where the VxOy barrier is produced by plasma oxidation at the surface of V‐stripe conducter. Objects of investigations are the relations between the evaporation conditions and the electric and superconducting properties of V films and fabrication of Josephson junctions. Determination of characteristic parameters of the Josephson junctions occurs from U–I characteristic and the magnetic field dependence of critical Josephson current. Results on stability of the VVxOy–Pb Josephson junctions against temperature changes and storage at atmospheric air and room temperature over 430 d are discussed.

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Section: Introductionmentioning

confidence: 90%

V–VxOy–Pb Josephson tunnel junctions of high stability

Seifarth¹,

Rentsch²

1973

Phys. Stat. Sol. (a)

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“…For instance, the maximum DC supercurrent in low T c superconductors, such as Pb, Sn, and Nb, decreases much faster than 1/R n above a few ohms. 4,5,6 MgB 2 does not show the supercurent for the big gap of ~7meV. 7,8 High T c cuprate Josephson junctions are mainly SNS type, including the intrinsic junctions.…”

Section: Introductionmentioning

confidence: 94%

“…The threshold behavior has been found in experiments. [4][5][6][7][8] Figure 1 7). It is remarkable that above R n~4 0Ω the suppercurrent of Sn-SnO-Pb junction becomes larger than those of Pb-PbO x -Pb and Nb-NbO x -Pb junctions.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

Threshold Resistance in the DC Josephson Effect

Kim

2006

AIP Conference Proceedings

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We show that SIS Josephson junctions have a threshold resistance, above which the Josephson coupling and the supercurrents become extremely small, due to the shrinking of the Cooper pair size during the Josephson tunneling. Accordingly, the threshold resistance is smaller for higher Tc superconductors with small Cooper pair size and for the insulating barrier with higher resistance. This understanding agrees with the observations in SIS junctions of low Tc superconductors, such as Sn, Pb, and Nb. For MgB2 it explains why the big gap does not show the supercurrents, unlike the small gap. Furthermore, it is consistent with the fact that high Tc cuprates show the Josephson effects only for SNS type junctions, including the intrinsic Josephson effects.Comment: Proceedings of LT24 Conference, 2 pages, 1 figure. For more information, please see http://www.superconductivity.us (1 RA position available

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“…A first experimental observation of the magnetic field dependence of the maximum Josephson current was obtained in work [10]. Lately, many experimental and theoretical investigations of this effect have been made for junctions of different types, which are classified as so-called "short" [11][12][13][14], with dimensions that are small compared to the Josephson penetration depth l λ J and "long" [15][16][17][18], for which l λ J . Nowadays, the investigations of the behaviour of Josephson junctions in an external magnetic field for the case of annular tunnel junctions [19,20] and junctions with a ferromagnetic interlayer are also actively developed [21].…”

Section: Introductionmentioning

confidence: 99%

The effect of an external magnetic field on the maximum current of SNINS junctions near the critical temperature

Pastukh¹,

Sakhnyuk²,

Svidzinsky³

2018

Condens. Matter Phys.

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The behaviour of superconducting junctions of SNINS-type (where S is superconductor, N is normal metal, I is insulator) with anharmonic current-phase relations in the external magnetic field near the critical temperature was investigated. The dependence of the maximum current on the value of the magnetic flux in a wide range of electron transmission coefficient values was considered. Also, it was investigated how the presence of a normal layer of an arbitrary thickness in the scale of coherence length and in the presence of impurities in superconducting regions affect the sensitivity of the maximum current to the magnetic field magnitude.

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Maximum dc Josephson Current inPb−PbOx−Pb

Cited by 28 publications

References 22 publications

V–VxOy–Pb Josephson tunnel junctions of high stability

V–VxOy–Pb Josephson tunnel junctions of high stability

Threshold Resistance in the DC Josephson Effect

The effect of an external magnetic field on the maximum current of SNINS junctions near the critical temperature

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