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Effects of fabrication routes on the control of superconducting currents by gate voltage

Authors :
Ruf, Leon
Elalaily, Tosson
Puglia, Claudio
Ivanov, Yurii P.
Joint, Francois
Berke, Martin
Iorio, Andrea
Makk, Peter
De Simoni, Giorgio
Gasparinetti, Simone
Divitini, Giorgio
Csonka, Szabolcs
Giazotto, Francesco
Scheer, Elke
Di Bernardo, Angelo
Publication Year :
2023

Abstract

The control of a superconducting current via the application of a gate voltage has been recently demonstrated in a variety of superconducting devices. Although the mechanism underlying this gate-controlled supercurrent (GCS) effect remains under debate, the GCS effect has raised great interest for the development of the superconducting equivalent of conventional metal-oxide semiconductor electronics. To date, however, the GCS effect has been mostly observed in superconducting devices made by additive patterning. Here, we show that devices made by subtractive patterning show a systematic absence of the GCS effect. Doing a microstructural analysis of these devices and comparing them to devices made by additive patterning, where we observe a GCS, we identify some material and physical parameters that are crucial for the observation of a GCS. We also show that some of the mechanisms proposed to explain the origin of the GCS effect are not universally relevant.<br />17 pages, 6 figures, 1 Table. arXiv admin note: text overlap with arXiv:2302.13734

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....75fb7610d54ca7f045aa34117e7d0492