Josephson effect due to the long-range odd-frequency triplet superconductivity in SFS junctions with Neel domain walls

Abstract

We consider a SFS Josephson junction made of two superconductors S and a multidomain ferromagnet F with an in-plane magnetization. We assume that the neighboring domains of the ferromagnet are separated by Neel domain walls. An odd-frequency triplet long-range component of superconducting correlations arises in the domain walls and spreads into the domains over a long distance of the order ${\xi }_T=\sqrt{D/2\pi T}$, where $D$ is the diffusion coefficient (dirty limit is implied). We calculate the contribution of this component to the Josephson current in the situation when conventional short-range components exponentially decay over the thickness of the F layer and can be neglected. In the limit when the thickness of the F layer is much smaller than the penetration length of the long-range component, we find that the junction is in the $\pi$ state. We also analyze a correction to the density of states due to the long-range triplet component.

12 pages (including 6 EPS figures)

References in corpus (7)

• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Theory of the proximity effect in junctions with unconventional superconductors
• Half-integer Shapiro steps at the 0-pi crossover of a ferromagnetic Josephson junction
• Effect of an inhomogeneous exchange field on the proximity effect in disordered superconductor-ferromagnet hybrid structures
• Switching superconductivity in S/F bilayers by multiple-domain structures
• Odd triplet superconductivity in a superconductor/ferromagnet structure with a spiral magnetic structure
• Long-range odd triplet superconductivity in SF structures with Neel walls

Cited by in corpus (10)

• Induced Triplet Pairing in clean s-wave Superconductor/Ferromagnet layered structures
• Theory of superconducting and magnetic proximity effect in S$\mid$F structures with inhomogeneous magnetization textures and spin-active interfaces
• Odd triplet superconductivity in superconductor-ferromagnet structures with a narrow domain wall
• 0-pi Transitions in a Superconductor/Chiral Ferromagnet/Superconductor Junction induced by a Homogeneous Cycloidal Spiral
• Josephson current in diffusive multilayer superconductor/ferromagnet/superconductor junctions
• Josephson current in a superconductor -- ferromagnet -- superconductor junction with in-plane ferromagnetic domains
• Effective spin-flip scattering in diffusive superconducting proximity systems with magnetic disorder
• Quantum transport in a normal metal/odd-frequency superconductor junction
• Conductance of a junction between a normal metal and a Berezinskii superconductor
• Surface effects in magnetic superconductors with a spiral magnetic structure