Hybrid superconducting quantum magnetometer

Details Hybrid superconducting quantum magnetometer Hybrid superconducting quantum magnetometer

2011-03-18

arxiv.org/abs/1103.3598v2

Phys. Rev. B 84, 214502 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

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

Scientific paper

10.1103/PhysRevB.84.214502

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.

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