title: The diamond superconducting quantum interference device.
abstract: Diamond is an electrical insulator in its natural form. However, when doped with boron above a critical level (∼0.25 atom %) 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 (μ-SQUID) made from nanocrystalline boron-doped diamond (BDD) films. Our results demonstrate that μ-SQUIDs made from superconducting diamond can be operated in magnetic fields as large as 4 T independent of the field direction. This is a decisive step toward the detection of quantum motion in a diamond-based nanomechanical oscillator.
authors.affiliation: Institut Néel, CNRS and Université Joseph Fourier, 38042 Grenoble, France. soumen.mandal@gmail.com
authors.forename: Soumen
authors.initials: S
authors.lastname: Mandal
authors.forename: Tobias
authors.initials: T
authors.lastname: Bautze
authors.forename: Oliver A
authors.initials: OA
authors.lastname: Williams
authors.forename: Cécile
authors.initials: C
authors.lastname: Naud
authors.forename: Étienne
authors.initials: É
authors.lastname: Bustarret
authors.forename: Franck
authors.initials: F
authors.lastname: Omnès
authors.forename: Pierre
authors.initials: P
authors.lastname: Rodière
authors.forename: Tristan
authors.initials: T
authors.lastname: Meunier
authors.forename: Christopher
authors.initials: C
authors.lastname: Bäuerle
authors.forename: Laurent
authors.initials: L
authors.lastname: Saminadayar