Density of states in the heterostructure ferromagnetic insulator-superconductor-ferromagnetic insulator

Abstract

We consider a spin valve composed of a superconducting film (S) between two ferromagnetic insulators (FI) on two sides. In the dirty limit the superconductor is described by Usadel equations. Appropriate boundary conditions were chosen for two S-FI interfaces, which are described via the interface parameter spin mixing angle. By numerically solving the Usadel equations, the density of states (DOS) at different spin mixing angles were obtained. It was shown previously that critical temperature of such FI-S-FI structure depends on the mutual alignment of the FI layers magnetization. We follow the evolution of DOS at change of misalignment of ferromagnets magnetization and probe the zero bias peak creation. The DOS characteristic features may give a fruitful information about triplet superconducting components creation and interplay inside the S layer.

References in corpus (7)

• Theory of the proximity effect in junctions with unconventional superconductors
• Triplet proximity effect in FSF trilayers
• Controlled suppression of superconductivity by the generation of polarized Cooper pairs in spin valve structures
• Magnetization dynamics in proximity-coupled superconductor/ferromagnet/superconductor multilayers
• Magnetic proximity effects in V/Fe superconductor/ferromagnet single bilayer revealed by waveguide-enhanced polarized neutron reflectometry
• Superconducting spin-valve effect in heterostructures with ferromagnetic Heusler alloy layers
• Quasiclassical boundary conditions for spin-orbit coupled interfaces with spin-charge conversion