The Diamond SQUID

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 $\mu$-SQUID made from nanocrystalline boron doped diamond (BDD) films. Our results demonstrate that $\mu$-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.

5 pages, 4 figures

References in corpus (10)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Circuit cavity electromechanics in the strong coupling regime
• Cooling a nanomechanical resonator with quantum back-action
• Persistent currents in normal metal rings
• Self-aligned nanoscale SQUID on a tip
• High quality factor gigahertz frequencies in nanomechanical diamond resonators
• Nanostructures made from superconducting boron doped diamond
• On-chip SQUID measurements in the presence of high magnetic fields
• Spatially-Correlated Microstructure and Superconductivity in Polycrystalline Boron-Doped Diamond
• Origin of Hysteresis in a Proximity Josephson Junction

Cited by in corpus (14)

• Scanning nano-SQUID with single electron spin sensitivity
• Nano Superconducting Quantum Interference device: a powerful tool for nanoscale investigations
• A detailed analysis of the Raman spectra in superconducting boron doped nanocrystalline diamond
• NanoSQUIDs: Basics & recent advances
• Superconducting nano-mechanical diamond resonators
• A high performance Nb nano-SQUID with a three-dimensional structure
• Nanocrystalline diamond-glass platform for the development of three-dimensional micro- and nanodevices
• Josephson Coupling in the Dissipative State of a Thermally Hysteretic $\mu$-SQUID
• Observation of conduction electron spin resonance in boron doped diamond
• Contact resistance of various metallisation schemes to superconducting boron doped diamond between 1.9 and 300 K
• Nano-bridge Superconducting Quantum Interference Devices: beyond the Josephson limit
• Superconducting boron doped nanocrystalline diamond microwave coplanar resonator
• Micron size superconducting quantum interference devices of lead (Pb)
• Current-induced nanogap formation and graphitization in boron-doped diamond films