Tunnel Spectroscopy of a Proximity Josephson Junction
M. Meschke, J. T. Peltonen, J. P. Pekola, and F. Giazotto
TL;DR
This study uses tunnel spectroscopy to investigate the phase and temperature dependence of the proximity effect in SNS Josephson junctions, demonstrating an advanced SQUIPT device with high flux sensitivity.
Contribution
It introduces a phase-biased SNS Josephson junction with tunnel spectroscopy, enhancing understanding of the proximity effect and improving flux sensitivity in superconducting devices.
Findings
The mini-gap and density of states depend on phase and temperature.
Results align with quasiclassical diffusive theory.
Achieved flux sensitivity of 3 nA/Φ₀.
Abstract
We present tunnel spectroscopy experiments on the proximity effect in lateral superconductor-normal metal-superconductor (SNS) Josephson junctions. Our weak link is embedded into a superconducting (S) ring allowing phase biasing of the Josephson junction by an external magnetic field. We explore the temperature and phase dependence of both the induced mini-gap and the modification of the density of states in the normal (N) metal. Our results agree with a model based on the quasiclassical theory in the diffusive limit. The device presents an advanced version of the superconducting quantum interference proximity transistor (SQUIPT), now reaching flux sensitivities of 3 nA where is the flux quantum.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.