Long Range Triplet Josephson Current and $0-\pi$ Transition in Tunable Domain Walls

Abstract

The order parameter of superconducting pairs penetrating an inhomogeneous magnetic material can acquire a long range triplet component (LRTC) with non-zero spin projection. This state has been predicted and generated recently in proximity systems and Josephson junctions. We show using an analytically derived domain wall of an exchange spring how the LRTC emerges and can be tuned with the twisting of the magnetization. We also introduce a new kind of Josephson current reversal, the triplet $0-\pi$ transition, that can be observed in one and the same system either by tuning the domain wall or by varying temperature.

6 pages, 4 figures

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Cited by in corpus (12)

• Superconducting Spintronics
• Nonlocal Andreev Entanglements and Triplet Correlations in Graphene with Spin Orbit Coupling
• Charge and Spin Currents in Ferromagnetic Josephson junctions
• Coexistence and tuning of spin-singlet and triplet transport in spin-filter Josephson junctions
• Pure Odd Frequency Superconductivity at the Cores of Proximity Vortices
• Josephson effect in SIFS-tunnel junctions with domain walls in weak link region
• Phase-controlled spin and charge currents in superconductor-ferromagnet hybrids
• Classification of magnetic inhomogeneities and $0-\pi$ transitions in superconducting-magnetic hybrid structures
• The role of canting and depleted-triplet minima in superconducting spin valve structures
• Magnetic field tunable superconducting transition in Nb/Co/Py/Nb exchange spring multilayers
• Phase separation and proximity effects in itinerant ferromagnet-superconductor heterostructures
• Magnetic-field-orientation-dependent triplet supercurrents in Josephson junctions with symmetric and asymmetric exchange-spring interfaces