The Diamond SQUID
Soumen Mandal, Tobias Bautze, Oliver A. Williams, C\'ecile Naud,, \'Etienne Bustarret, Franck Omn\`es, Pierre Rodi\`ere, Tristan Meunier,, Christopher B\"auerle, Laurent Saminadayar
TL;DR
This paper reports the development of a diamond-based superconducting quantum interference device ($$-SQUID) using boron-doped diamond films, capable of operating in high magnetic fields, advancing quantum motion detection in diamond nanomechanics.
Contribution
The paper introduces a novel $$-SQUID made from nanocrystalline boron-doped diamond, demonstrating high-field operation and potential for quantum motion detection.
Findings
Operates in magnetic fields up to 4 Tesla
Made from nanocrystalline boron-doped diamond
Enables quantum motion detection in diamond nanomechanical systems
Abstract
Diamond is an electrical insulator in its natural form. However, when doped with boron above a critical level (~0.25 at.%) it can be rendered superconducting at low temperatures with high critical fields. Here we present the realization of a micrometer scale superconducting quantum interference device -SQUID made from nanocrystalline boron doped diamond (BDD) films. Our results demonstrate that -SQUIDs made from superconducting diamond can be operated in magnetic fields as large as 4T independent on the field direction. This is a decisive step towards the detection of quantum motion in a diamond based nanomechanical oscillator.
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