Effects of fabrication routes and material parameters on the control of superconducting currents by gate voltage
Artikel i vetenskaplig tidskrift, 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.
Författare
L. Ruf
Universität Konstanz
T. Elalaily
Budapesti Muszaki es Gazdasagtudomanyi Egyetem
Tanta University
C. Puglia
Scuola Normale Superiore di Pisa
Yu P. Ivanov
Istituto Italiano di Tecnologia
François Joint
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
M. Berke
Budapesti Muszaki es Gazdasagtudomanyi Egyetem
A. Iorio
Scuola Normale Superiore di Pisa
Péter Makk
Budapesti Muszaki es Gazdasagtudomanyi Egyetem
G. De Simoni
Scuola Normale Superiore di Pisa
Simone Gasparinetti
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
G. Divitini
Istituto Italiano di Tecnologia
Szabolcs Csonka
Budapesti Muszaki es Gazdasagtudomanyi Egyetem
Francesco Giazotto
Scuola Normale Superiore di Pisa
E. Scheer
Universität Konstanz
A. Di Bernardo
Universita degli Studi di Salerno
Universität Konstanz
APL Materials
2166-532X (eISSN)
Vol. 11 9 091113Gate Tuneable Superconducting Quantum Electronics (SuperGate)
Europeiska kommissionen (EU) (EC/H2020/964398), 2021-03-01 -- 2024-08-31.
Ämneskategorier
Annan elektroteknik och elektronik
Den kondenserade materiens fysik
DOI
10.1063/5.0159750