On-Chip Integrable Planar NbN NanoSQUID with Broad Temperature and Magnetic-Field Operation Range

Itamar Holzman; Yachin Ivry

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arXiv · 1904.07739

On-Chip Integrable Planar NbN NanoSQUID with Broad Temperature and Magnetic-Field Operation Range

Itamar Holzman·Yachin Ivry

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Abstract

Superconducting quantum interference devices (SQUIDs) are used for applications ranging from sensitive magnetometers to low-temperature electronics and quantum computation. We introduce a planar nano SQUID that was made with a single lithographic step out of NbN films as thin as 3 nm on a Si chip. The fabrication process of weak links that are 45 nm in width, and 165 nm in length, which were designed to account for overcoming current crowding are presented. Operation at a temperature range of 20 mK to 5 K as well as at 1 T parallel, and 10 mT perpendicular magnetic fields is demonstrated, while potential operation higher than 8 T has also been shown. The broad range of applicability of a single device as well as its scalability are promising for on-chip integrability that may open new technological possibilities, including in quantum and electro-optical circuiting.

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Itamar Holzman, Yachin Ivry. 2019-04-16. On-Chip Integrable Planar NbN NanoSQUID with Broad Temperature and Magnetic-Field Operation Range. https://arxiv.org/abs/1904.07739

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