Hybrid superconducting quantum magnetometer

Abstract

A superconducting quantum magnetometer based on magnetic flux-driven modulation of the density of states of a proximized metallic nanowire is theoretically analyzed. With optimized geometrical and material parameters transfer functions up to a few mV/Phi_0 and intrinsic flux noise ~10^{-9}Phi_0 Hz^{-1/2} below 1 K are achievable. The opportunity to access single-spin detection joined with limited dissipation (of the order of ~ 10^{-14} W) make this magnetometer interesting for the investigation of the switching dynamics of molecules or individual magnetic nanoparticles.

6 pages, 6 color figures, added calculation of the Josephson current, published version

References in corpus (5)

• Phase controlled superconducting proximity effect probed by tunneling spectroscopy
• A Terraced Scanning Superconducting Quantum Interference Device Susceptometer with Sub-Micron Pickup Loops
• Cooling electrons from 1 K to 400 mK with V-based nanorefrigerators
• Josephson current in nanofabricated V/Cu/V mesoscopic junctions
• Flux qubit as a sensor for a magnetometer with quantum limited sensitivity

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