Fabrication of TlCaBaCuO step-edge Josephson junctions with hysteretic behavior

Journal Article · Mon Feb 24 04:00:00 EST 1992 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.106506· OSTI ID:7047107

Martens, J S; Hietala, V M; Zipperian, T E; Vawter, G A; Ginley, D S; Tigges, C P; Plut, T A ^[1]; Hohenwarter, G K.G. ^[2]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185-5800 (United States)
2. University of Wisconsin-Madison, ECE Department, Madison, Wisconsin 53706 (United States)

One way to create hysteretic Josephson junctions from the currently available nonhysteretic high temperature superconducting junctions is to artificially add capacitance. We have adapted a multilayer technique for artificial capacitance addition/grain boundary modification to produce TlCaBaCuO step-edge junctions exhibiting large amounts of hysteresis at 77 K. A gaplike structure is present at 32--36 mV that has a temperature dependence that does not contradict that predicted by the Bardeen-Cooper-Schrieffer theory. In addition, the junctions show fast switching times, less than a fixture limited 20 ps, and Fraunhofer-like dependence of critical current on magnetic field.

• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7047107
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 60:8; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BCS THEORY
CALCIUM COMPOUNDS
CALCIUM OXIDES
CAPACITORS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
CUPRATES
ELECTRICAL EQUIPMENT
EQUIPMENT
FABRICATION
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
JOSEPHSON JUNCTIONS
JUNCTIONS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS