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Proceedings Paper

Mutual phase locking in systems of high-Tc superconductor-normal metal-superconductor junctions
Author(s): Carl D. Reintsema; Ronald H. Ono; Todd E. Harvey; N. Missert; Leila R. Vale
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Paper Abstract

We have investigated the interaction between high critical temperature (high-Tc) superconductor-normal metal- superconductor step-edge junctions coupled through a non- superconducting feedback loop. We have characterized the strength of the interaction as a function of frequency and temperature for both a circuit without a groundplane and an all high-Tc multilayer circuit incorporating a superconducting ground plane. We observed relative locking strengths (the ratio of the measured locking current IL to the junctions average critical current Ic) as large as ILIcequals9% and peak locking frequencies as high as 1.06 THz. The maximum temperature at which locking occurred was 35 K. An analysis of the temperature dependence of the locking current accounting for thermal fluctuations in the context of Johnson noise from resistive elements in the circuit agrees well with our experimental observations.

Paper Details

Date Published: 2 July 1994
PDF: 11 pages
Proc. SPIE 2160, Superconductive Devices and Circuits, (2 July 1994); doi: 10.1117/12.181005
Show Author Affiliations
Carl D. Reintsema, Univ. of Colorado/Boulder (United States)
Ronald H. Ono, National Institute of Standards and Technology (United States)
Todd E. Harvey, National Institute of Standards and Technology (United States)
N. Missert, National Institute of Standards and Technology (United States)
Leila R. Vale, National Institute of Standards and Technology (United States)

Published in SPIE Proceedings Vol. 2160:
Superconductive Devices and Circuits
Robert A. Buhrman; John T. Clarke; Ken Daly; Roger H. Koch; Jerome A. Luine; Randy W. Simon, Editor(s)

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