Temperature-biased double-loop Josephson flux transducer
release_rcxymsbtazfb5e3selqo2njo3y
by
Claudio Guarcello, Roberta Citro, Francesco Giazotto, Alessandro Braggio
2022
Abstract
We theoretically study the behavior of the critical current of a
thermally-biased tunnel Josephson junction with a particular design, in which
the electrodes of the junction are enclosed in two different superconducting
loops pierced by independent magnetic fluxes. In this setup, the
superconducting gaps can be modified independently through the magnetic fluxes
threading the loops. We investigate the response of the device as a function of
the magnetic fluxes, by changing the asymmetry parameter, i.e., the ratio
between the zero-temperature superconducting gaps
δ=Δ_10/Δ_20, and the temperatures of the two rings. We
demonstrate a magnetically controllable step-like response of the critical
current, which emerges even in a symmetric junction, δ=1. Finally, we
discuss the optimal working conditions and the high response of the critical
current to small changes in the magnetic flux, reporting good performances of
the transducer, with a high transfer function that depends on the operating
point and the quality of the junction.
In text/plain
format
Archived Files and Locations
application/pdf 10.3 MB
file_5d72lx2ic5axnlz7yvipgapf2a
|
arxiv.org (repository) web.archive.org (webarchive) |
2110.10585v2
access all versions, variants, and formats of this works (eg, pre-prints)