Controllable supercurrent in mesoscopic superconductor-normal metal-ferromagnet crosslike Josephson structures
Abstract
A nonmonotonic dependence of the critical Josephson supercurrent on the injection current through a normal metal/ferromagnet weak link from a single domain ferromagnetic strip has been observed experimentally in nanofabricated planar crosslike S-N/F-S Josephson structures. This behavior is explained by 0-pi and pi-0 transitions, which can be caused by the suppression and Zeeman splitting of the induced superconductivity due to interaction between N and F layers, and the injection of spin-polarized current into the weak link. A model considering both effects has been developed. It shows the qualitative agreement between the experimental results and the theoretical model in terms of spectral supercurrent-carrying density of states of S-N/F-S structure and the spin-dependent double-step nonequilibrium quasiparticle distribution.
Keywords
Cite
@article{arxiv.2008.03217,
title = {Controllable supercurrent in mesoscopic superconductor-normal metal-ferromagnet crosslike Josephson structures},
author = {Tatiana E. Golikova and Michael J. Wolf and Detlef Beckmann and Grigory A. Penzyakov and Igor E. Batov and Irina V. Bobkova and Alexander M. Bobkov and Valery V. Ryazanov},
journal= {arXiv preprint arXiv:2008.03217},
year = {2021}
}