Effects of fabrication routes and material parameters on the control of superconducting currents by gate voltage
Journal article, 2023
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.
Author
L. Ruf
University of Konstanz
T. Elalaily
Budapest University of Technology and Economics
Tanta University
C. Puglia
Scuola Normale Superiore di Pisa
Yu P. Ivanov
Istituto Italiano di Tecnologia
François Joint
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
M. Berke
Budapest University of Technology and Economics
A. Iorio
Scuola Normale Superiore di Pisa
Péter Makk
Budapest University of Technology and Economics
G. De Simoni
Scuola Normale Superiore di Pisa
Simone Gasparinetti
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
G. Divitini
Istituto Italiano di Tecnologia
Szabolcs Csonka
Budapest University of Technology and Economics
Francesco Giazotto
Scuola Normale Superiore di Pisa
E. Scheer
University of Konstanz
A. Di Bernardo
University of Salerno
University of Konstanz
APL Materials
2166-532X (eISSN)
Vol. 11 9 091113Gate Tuneable Superconducting Quantum Electronics (SuperGate)
European Commission (EC) (EC/H2020/964398), 2021-03-01 -- 2024-08-31.
Subject Categories
Other Electrical Engineering, Electronic Engineering, Information Engineering
Condensed Matter Physics
DOI
10.1063/5.0159750