4. Josephson and SQUID junctions: technological aspects
The technology of low-critical-temperature Josephson junctions, known as LT c junctions, is now well established. These are essentially junctions corresponding to the Nb-AlO x -Nb stack, and are therefore of the superconductor-insulator-superconductor type (figure 9 ). They are shunted by a resistor to achieve non-hysteretic behavior. Their characteristics are stable under thermal cycling, reproducible, well matched to theory, and exhibit excess noise only at very low frequencies (f ≤ 10 Hz). Excess noise depends on the quality of the various interfaces, so it varies from one realization to another. For this reason, the energy resolution ε of a SQUID is specified at high frequency...
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Josephson and SQUID junctions: technological aspects
Implementation of a continuous SQUID
Bibliography
References
Books and magazines
Superconducting Electronics. Edited by Harold Weinstock and Martin Nisenoff NATO ASI Series. Series F: Computer and Systems Sciences, Vol. 59 (1989).
Superconducting Devices. Edited by Steven T. Ruggiero and David A. Rudman. Academic Press, Inc, New York (1990).
The New Superconducting Electronics. Edited by Harold Weinstock and Richard W. Ralston. NATO ASI Series....
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