Effect of thermal noise on Shapiro steps in high-TC Josephson weak links

The amplitudes of Shapiro steps are measured at temperatures up to 77 K for a superconductor-normal metal-superconductor Josephson weak link fabricated from YBa2Cu3O7−δ with a Ag-Au alloy bridge. The step amplitudes are found to be in agreement with calculations based on the resistively shunted-junc...

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Bibliographic Details
Published in:Applied physics letters 1992-07, Vol.61 (3), p.342-344
Main Authors: KAUTZ, R. L, ONO, R. H, REINTSEMA, C. D
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Proximity effects, weak links, tunneling phenomena, and josephson effects, adreev effect, sn and sns junctions
Superconductivity
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Summary:The amplitudes of Shapiro steps are measured at temperatures up to 77 K for a superconductor-normal metal-superconductor Josephson weak link fabricated from YBa2Cu3O7−δ with a Ag-Au alloy bridge. The step amplitudes are found to be in agreement with calculations based on the resistively shunted-junction model when the Johnson noise of the junction resistance is included.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.107931