Reduced decay in Josephson coupling across ferromagnetic junctions with spin-orbit coupling layers
arXiv:2407.19799 · doi:10.1063/5.0214835
Abstract
The generation of triplet Cooper pairs has been predicted theoretically in superconducting-ferromagnetic hybrid heterostructures in the presence of spin-orbit coupling [F. S. Bergeret and I. V. Tokatly, Phys. Rev. B 89, 134517 (2014) and Jacobsen et al., Sci. Rep. 6, 23926 (2016)]. In this study, we experimentally investigate vertical Josephson junctions where the weak link is formed from a ferromagnetic layer with perpendicular magnetic anisotropy sandwiched by two non-magnetic layers with weak or strong spin-orbit coupling. We find that the decay of the Josephson coupling is reduced in the latter case, possibly indicating the presence of spin-triplet correlations. We speculate that the canted magnetization required for these correlations is provided by the interaction of magnetization with Meissner effect in the superconducting layers.
References in corpus (26)
- Proximity effects in superconductor-ferromagnet heterostructures
- A spin triplet supercurrent through the half-metallic ferromagnet CrO2
- Long-range effects in superconductor-ferromagnet structures
- Observation of spin-triplet superconductivity in Co-based Josephson Junctions
- Quiet SDS Josephson Junctions for Quantum Computing
- Triplet supercurrents in clean and disordered half-metallic ferromagnets
- Theory of Half Metal-Superconductor Heterostructures
- Implementation of superconductor-ferromagnet-superconductor pi-shifters in superconducting digital and quantum circuits
- Odd-frequency superconductivity
- Spin-orbit coupling as a source of long-range triplet proximity effect in superconductor-ferromagnet hybrid structures
- Beyond Moore's technologies: operation principles of a superconductor alternative
- Superconducting pi qubit with a ferromagnetic Josephson junction
- Demonstration of a superconducting diode-with-memory, operational at zero magnetic field with switchable nonreciprocity
- CPP Magnetoresistance of Magnetic Multilayers: A critical review
- Experimental demonstration of a Josephson magnetic memory cell with a programmable π-junction
- Detection of the phase shift from a single quantized superconducting vortex
- Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers
- Spin Triplet Supercurrent in Co/Ni Multilayer Josephson Junctions with Perpendicular Anisotropy
- Ferromagnetic Materials for Josephson π Junctions
- Transport equations for superconductors in the presence of spin interaction
- Josephson junctions in a local inhomogeneous magnetic field
- Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers. II. Canted magnetization
- Long-ranged triplet supercurrent in a single in-plane ferromagnet with spin-orbit coupled contacts to superconductors
- Crossover between short and long range proximity effects in SFS junctions with Ni-based ferromagnets
- The quasiclassical theory for interfaces with spin--orbit coupling
- Pt and CoB trilayer Josephson junctions with perpendicular magnetic anisotropy