Single and Stacked Josephson Junctions based on c-axis YBCO/PBCO Multilayers

M. A. Bari; B. Ghyselen; E. J. Tarte; R. E. Somekh; Y. Yan; J. E. Evetts; M. G. Blamire; R. G. Humphreys; N. G. Chew

doi:10.1109/77.403062

Single and Stacked Josephson Junctions based on c-axis YBCO/PBCO Multilayers

M. A. Bari, B. Ghyselen, E. J. Tarte, R. E. Somekh, Y. Yan, J. E. Evetts, M. G. Blamire, R. G. Humphreys, N. G. Chew

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Using Whole Wafer superconducting device technology we have fabricated vertically stacked sandwich junctions with c-axis oriented YBCO/PBCO/YBCO trilayers and double barrier junctions. The resulting devices exhibit supercurrents through PBCO thicknesses of up t o 130 nm at 4.2K. We have observed RSJ-like I-V curves, Shapiro steps and almost Fraunhofer-like dependence of the critical current as a function of magnetic field. The scaling behaviour of devices fabricated on perovskite (SrTiO3 and LaAlO3) and MgO substrates differ. The results indicate a certain uniformity for the barriers on the scale of the size of the junction. We propose different mechanisms for supercurrent and quasiparticle transport through the PBCO barrier for the two substrate types.

Original language	English
Pages (from-to)	2369-2372
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	5
Issue number	2
DOIs	https://doi.org/10.1109/77.403062
State	Published - Jun 1995
Externally published	Yes

Funding

Manuscript received October 16, 1994 This work is supported by the European Commision (ESPRIT Programme contract no. 6677 "United 11")

Funders	Funder number
ESPRIT	6677
European Commision

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10.1109/77.403062

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title = "Single and Stacked Josephson Junctions based on c-axis YBCO/PBCO Multilayers",

abstract = "Using Whole Wafer superconducting device technology we have fabricated vertically stacked sandwich junctions with c-axis oriented YBCO/PBCO/YBCO trilayers and double barrier junctions. The resulting devices exhibit supercurrents through PBCO thicknesses of up t o 130 nm at 4.2K. We have observed RSJ-like I-V curves, Shapiro steps and almost Fraunhofer-like dependence of the critical current as a function of magnetic field. The scaling behaviour of devices fabricated on perovskite (SrTiO3 and LaAlO3) and MgO substrates differ. The results indicate a certain uniformity for the barriers on the scale of the size of the junction. We propose different mechanisms for supercurrent and quasiparticle transport through the PBCO barrier for the two substrate types.",

author = "Bari, {M. A.} and B. Ghyselen and Tarte, {E. J.} and Somekh, {R. E.} and Y. Yan and Evetts, {J. E.} and Blamire, {M. G.} and Humphreys, {R. G.} and Chew, {N. G.}",

year = "1995",

month = jun,

doi = "10.1109/77.403062",

language = "English",

volume = "5",

pages = "2369--2372",

journal = "IEEE Transactions on Applied Superconductivity",

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T1 - Single and Stacked Josephson Junctions based on c-axis YBCO/PBCO Multilayers

AU - Bari, M. A.

AU - Ghyselen, B.

AU - Tarte, E. J.

AU - Somekh, R. E.

AU - Yan, Y.

AU - Evetts, J. E.

AU - Blamire, M. G.

AU - Humphreys, R. G.

AU - Chew, N. G.

PY - 1995/6

Y1 - 1995/6

N2 - Using Whole Wafer superconducting device technology we have fabricated vertically stacked sandwich junctions with c-axis oriented YBCO/PBCO/YBCO trilayers and double barrier junctions. The resulting devices exhibit supercurrents through PBCO thicknesses of up t o 130 nm at 4.2K. We have observed RSJ-like I-V curves, Shapiro steps and almost Fraunhofer-like dependence of the critical current as a function of magnetic field. The scaling behaviour of devices fabricated on perovskite (SrTiO3 and LaAlO3) and MgO substrates differ. The results indicate a certain uniformity for the barriers on the scale of the size of the junction. We propose different mechanisms for supercurrent and quasiparticle transport through the PBCO barrier for the two substrate types.

AB - Using Whole Wafer superconducting device technology we have fabricated vertically stacked sandwich junctions with c-axis oriented YBCO/PBCO/YBCO trilayers and double barrier junctions. The resulting devices exhibit supercurrents through PBCO thicknesses of up t o 130 nm at 4.2K. We have observed RSJ-like I-V curves, Shapiro steps and almost Fraunhofer-like dependence of the critical current as a function of magnetic field. The scaling behaviour of devices fabricated on perovskite (SrTiO3 and LaAlO3) and MgO substrates differ. The results indicate a certain uniformity for the barriers on the scale of the size of the junction. We propose different mechanisms for supercurrent and quasiparticle transport through the PBCO barrier for the two substrate types.

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ER -

Single and Stacked Josephson Junctions based on c-axis YBCO/PBCO Multilayers

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