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Harnessing the superconducting diode effect through inhomogeneous magnetic fields

Authors :
Cadorim, Leonardo Rodrigues
Sardella, Edson
Silva, Clécio Clemente de Souza
Source :
Phys. Rev. Applied 21, 054040, 2024
Publication Year :
2024

Abstract

We propose a superconducting diode device comprising a central superconducting film flanked by two wires carrying an applied DC bias, suitably chosen so as to generate different asymmetric field profiles. Through numerical simulations of the coupled Ginzburg-Landau and heat-diffusion equations, we show that this design is capable of efficiently breaking the reciprocity of the critical current in the central superconductor, thus promoting the diode effect in response to an applied AC current. By adjusting the DC bias in the wires, we find the optimum inhomogeneous field profile that facilitates the entrance of vortices and antivortices in a given polarity of the applied AC current and impede their entrance in the other polarity. This way, the system behaves as an ideal superconducting half-wave rectifier, with diode efficiencies surpassing 70%. Furthermore, we detail the behavior and diode efficiency of the system under different experimental conditions, such as the substrate heat transfer coefficient and the sweep rate of the external current.<br />Comment: 13 pages, 14 figures

Details

Database :
arXiv
Journal :
Phys. Rev. Applied 21, 054040, 2024
Publication Type :
Report
Accession number :
edsarx.2403.00630
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevApplied.21.054040