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arXiv · 0712.0063

Suppression of the critical current of a balanced SQUID

Antti Kemppinen·Antti J. Manninen·Mikko Möttönen·Juha J. Vartiainen·Joonas T. Peltonen·Jukka P. Pekola
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Abstract

We present an experimental study of the magnetic flux dependence of the critical current of a balanced SQUID with three Josephson junctions in parallel. Unlike for ordinary dc SQUIDs, the suppression of the critical current does not depend on the exact parameters of the Josephson junctions. The suppression is essentially limited only by the inductances of the SQUID loops. We demonstrate a critical current suppression ratio of higher than 300 in a balanced SQUID with a maximum critical current 30 nA.

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Antti Kemppinen, Antti J. Manninen, Mikko Möttönen, Juha J. Vartiainen, Joonas T. Peltonen, Jukka P. Pekola. 2007-12-01. Suppression of the critical current of a balanced SQUID. https://doi.org/10.1063/1.2842413

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