Gold contacts on superconducting crystals of YBa sub 2 Cu sub 3 O sub 7 with very low contact resistivity

Journal Article · Mon Oct 30 04:00:00 EST 1989 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.102167· OSTI ID:5364566

Jing, T W; Wang, Z Z; Ong, N P ^[1]

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1. Joseph Henry Laboratories of Physics, Princeton University, Princeton, New Jersey 08544 (US)

By cleaving crystals of YBa{sub 2}Cu{sub 3}O{sub 7} in high vacuum and evaporating Au {ital in} {ital situ}, we have fabricated Au-YBa{sub 2}Cu{sub 3}O{sub 7} junctions with very low contact resistance. Below {ital T}{sub {ital c}}, the specified contact resistivity drops by three decades to an estimated value 2{times}10{sup {minus}9} {Omega} cm{sup 2} at 87.3 K. We emphasize the importance of correcting for spreading resistance in such studies. We also discuss the ideal contact resistivity, and possible contributions to the measured resistance very near {ital T}{sub {ital c}}.

• OSTI ID: 5364566
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 55:18; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
ELEMENTS
EQUIPMENT
EXPERIMENTAL DATA
FABRICATION
GOLD
INFORMATION
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TYPE-II SUPERCONDUCTORS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES