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.

References in corpus (10)

• Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
• Non-Local Correlations in Normal Metal-Superconducting Systems
• Spin Imbalance and Spin-Charge Separation in a Mesoscopic Superconductor
• Long-range spin-polarized quasiparticle transport in mesoscopic Al superconductors with a Zeeman splitting
• Revealing the magnetic proximity effect in EuS/Al bilayers through superconducting tunneling spectroscopy
• Spin injection and relaxation in a mesoscopic superconductor
• Charge imbalance in superconductors in the low-temperature limit
• Spin injection from a normal metal into a mesoscopic superconductor
• Fabrication and measurements of hybrid Nb/Al Josephson junctions and flux qubits with pi-shifters
• Size Dependence of Current Spin Polarization Through Superconductor/Ferromagnet Nanocontacts

Cited by in corpus (5)

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• Gate-tunable nonlocal Josephson effect through magnetic van der Waals bilayers
• Supercurrent-induced long-range triplet correlations and controllable Josephson effect in superconductor/ferromagnet hybrids with extrinsic SOC
• Voltage-driven dynamics of ${\phi }_0$-S/F/S Josephson junctions chains
• Anomalous phase shift and superconducting diode effect in Josephson junctions via thin films of rare-earth intermetallic magnets