Phase dynamics of tunnel Al-based ferromagnetic Josephson junctions

Author:

Ahmad H. G.1ORCID,Satariano R.12ORCID,Ferraiuolo R.12ORCID,Vettoliere A.3ORCID,Granata C.3ORCID,Montemurro D.1ORCID,Ausanio G.12ORCID,Parlato L.12ORCID,Pepe G. P.12ORCID,Tafuri F.1ORCID,Massarotti D.24ORCID

Affiliation:

1. Dipartimento di Fisica “Ettore Pancini,” Università degli Studi di Napoli Federico II 1 , Via Cinthia, I-80126 Napoli, Italy

2. CNR-SPIN, UOS Napoli, Monte S. Angelo 2 , Via Cinthia, I-80126 Napoli, Italy

3. Consiglio Nazionale delle Ricerche-ISASI 3 , Via Campi Flegrei 34, I-80078 Pozzuoli, Italy

4. Dipartimento di Ingegneria Elettrica e delle Tecnologie dell'Informazione, Università degli Studi di Napoli Federico II 4 , I-80125 Napoli, Italy

Abstract

By measuring the current–voltage characteristics and the switching current distributions as a function of temperature, we have investigated the phase dynamics of Al tunnel ferromagnetic Josephson junctions (JJs), designed to fall in the typical range of parameters of state-of-the-art transmons, providing evidence of phase diffusion processes. The comparison with the experimental outcomes on non-magnetic JJs with nominally the same electrodynamical parameters demonstrates that the introduction of ferromagnetic barriers does not cause any sizeable detrimental effect and supports the notion of including tunnel ferromagnetic JJs in qubit architectures.

Funder

HORIZON EUROPE European Innovation Council

Ministero dell'Istruzione, dell'Università e della Ricerca

QuantERA

Ministero dell'Università e della Ricerca

Publisher

AIP Publishing

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