Phase dynamics and dissipation in tunnel ferromagnetic Josephson junctions
Abstract
We investigate tunnel ferromagnetic Josephson junctions based on Superconductor-Insulator-thin superconductor-Ferromagnet-Superconductor multilayers. A comparative study of their electrodynamic properties is performed for junctions with niobium and aluminum (Al) electrodes, featuring different ferromagnetic interlayer materials and lateral dimensions ranging from the micrometric to the submicrometric scale. The parameters extracted from the fitting of the current-voltage characteristics using the tunnel junction microscopic model are found to be consistent with those independently estimated from switching current distribution measurements. Submicrometric Al-based devices exhibit electrodynamic properties comparable to those implemented in state-of-the-art transmon qubits and display clear signatures of quantum phase diffusion. The strong agreement between transport modelling and escape dynamics establishes a robust framework for describing hybrid ferromagnetic Josephson junctions consistent with their energy scales and supports their potential integration into superconducting quantum and classical digital circuits.
Versions
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BibTeX
@misc{calloni2026phase,
title = {{Phase dynamics and dissipation in tunnel ferromagnetic Josephson junctions}},
author = {F. Calloni and R. Satariano and R. Ferraiuolo and H. G. Ahmad and D. Gatta and E. Raja and G. Santo and G. Serpico and R. Vidyasagar and D. Montemurro and N. Poccia and A. Vettoliere and G. Ausanio and C. Granata and L. Parlato and G. P. Pepe and A. Bruno and F. Tafuri and D. Massarotti},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2605.18586},
eprint = {2605.18586},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.18586},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - Phase dynamics and dissipation in tunnel ferromagnetic Josephson junctions
AU - F. Calloni
AU - R. Satariano
AU - R. Ferraiuolo
AU - H. G. Ahmad
AU - D. Gatta
AU - E. Raja
AU - G. Santo
AU - G. Serpico
AU - R. Vidyasagar
AU - D. Montemurro
AU - N. Poccia
AU - A. Vettoliere
AU - G. Ausanio
AU - C. Granata
AU - L. Parlato
AU - G. P. Pepe
AU - A. Bruno
AU - F. Tafuri
AU - D. Massarotti
PY - 2026
DA - 2026/10/08
PB - arXiv
DO - 10.48550/arxiv.2605.18586
UR - https://arxiv.org/abs/2605.18586
AB - We investigate tunnel ferromagnetic Josephson junctions based on Superconductor-Insulator-thin superconductor-Ferromagnet-Superconductor multilayers. A comparative study of their electrodynamic properties is performed for junctions with niobium and aluminum (Al) electrodes, featuring different ferromagnetic interlayer materials and lateral dimensions ranging from the micrometric to the submicrometric scale. The parameters extracted from the fitting of the current-voltage characteristics using the tunnel junction microscopic model are found to be consistent with those independently estimated from switching current distribution measurements. Submicrometric Al-based devices exhibit electrodynamic properties comparable to those implemented in state-of-the-art transmon qubits and display clear signatures of quantum phase diffusion. The strong agreement between transport modelling and escape dynamics establishes a robust framework for describing hybrid ferromagnetic Josephson junctions consistent with their energy scales and supports their potential integration into superconducting quantum and classical digital circuits.
ER -