Critical Current Densities through Josephson Junctions in Low Magnetic Fields

Din, Brad; Blair, Alexander; Schoofs, Frank; Hampshire, Damian

doi:10.1109/tasc.2022.3156908

Critical Current Densities through Josephson Junctions in Low Magnetic Fields

Din, Brad; Blair, Alexander; Schoofs, Frank; Hampshire, Damian

Authors

Brad Din bradley.p.din@durham.ac.uk
PGR Student Doctor of Philosophy

Alexander Blair

Frank Schoofs

Professor Damian Hampshire d.p.hampshire@durham.ac.uk
Professor

Abstract

Understanding the properties of grain boundaries in polycrystalline superconductors is essential for optimizing their critical current density. Here, we provide computational simulations of 2D Josephson junctions (JJs) in low magnetic fields using time-dependent Ginzburg-Landau theory, since they can be considered a proxy for a grain boundary between two grains. We present data for junctions with a wide range of superconducting electrodes of different Ginzburg-Landau parameter () values and geometries, as well as normal barriers with different strengths of pair-breaking - characterized by the thickness of the junction and the junction condensation parameter (n) We describe our results using analytic solutions, and hence provide a detailed description of Josephson junctions in low fields up to that required for a single fluxon to penetrate the junction.

Citation

Din, B., Blair, A., Schoofs, F., & Hampshire, D. (2022). Critical Current Densities through Josephson Junctions in Low Magnetic Fields. IEEE Transactions on Applied Superconductivity, 32(4), Article 8000805. https://doi.org/10.1109/tasc.2022.3156908

Journal Article Type	Article
Acceptance Date	Jan 28, 2022
Online Publication Date	Mar 7, 2022
Publication Date	2022-06
Deposit Date	Mar 11, 2022
Publicly Available Date	Mar 11, 2022
Journal	IEEE Transactions on Applied Superconductivity
Print ISSN	1051-8223
Publisher	Institute of Electrical and Electronics Engineers
Peer Reviewed	Peer Reviewed
Volume	32
Issue	4
Article Number	8000805
DOI	https://doi.org/10.1109/tasc.2022.3156908

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