Issue 14, 2022

Targeted modifications of monolithic multiterminal superconducting weak-links

Abstract

In a multi-branch metallic interconnect we demonstrate the possibility to induce targeted modifications of the material properties by properly selecting the intensity and polarity of the applied current. We illustrate this effect in Y-shape multiterminal devices made of Nb on sapphire for which we show that the superconducting critical current can be lowered in a controlled manner at a preselected junction. We further observe the gradual appearance of Fraunhofer-like critical current oscillations with magnetic field which indicates the gradual modification of a superconducting weak link. This method permits progressive modifications of a hand-picked junction without affecting the neighboring terminals. The proposed approach has the benefit of being inexpensive and requiring conventional electronics. This technique represents a major step toward all-electric control of multiterminal Josephson junctions.

Graphical abstract: Targeted modifications of monolithic multiterminal superconducting weak-links

Supplementary files

Article information

Article type
Paper
Submitted
03 Jan 2022
Accepted
16 Mar 2022
First published
17 Mar 2022

Nanoscale, 2022,14, 5425-5429

Targeted modifications of monolithic multiterminal superconducting weak-links

S. Collienne, D. Majidi, J. Van de Vondel, C. B. Winkelmann and A. V. Silhanek, Nanoscale, 2022, 14, 5425 DOI: 10.1039/D2NR00026A

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