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Low-noise diamond-based D.C. nano-SQUIDs

Bose, Manjith, Creedon, Daniel L., Barlow, Anders, Stuiber, Michael, Klemencic, Georgina M. ORCID:, Mandal, Soumen ORCID:, Williams, Oliver ORCID:, van Riessen, Grant and Pakes, Christopher I. 2022. Low-noise diamond-based D.C. nano-SQUIDs. ACS Applied Electronic Materials 4 (5) , pp. 2246-2252. 10.1021/acsaelm.2c00048

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Nanoscale superconducting quantum interference devices (nano-SQUIDs) with Dayem bridge junctions and a physical loop size of 50 nm have been engineered in boron-doped nanocrystalline diamond films using precision Ne-ion beam milling. In an unshunted device, the nonhysteretic operation can be maintained in an applied field exceeding 0.1 T with a high flux-to-voltage transfer function, giving a low flux noise at 1 kHz and a concurrent spin sensitivity of . At elevated magnetic fields, up to 2 T, flux modulation of the nano-SQUID output voltage is maintained but with an increase in period, attributed to an additional phase bias induced on the nano-SQUID loop by up to 16 vortices per period penetrating the nano-SQUID electrodes.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Chemical Society
ISSN: 2637-6113
Date of First Compliant Deposit: 5 May 2022
Date of Acceptance: 24 March 2022
Last Modified: 08 Nov 2023 08:28

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