Density of states in spin-valve structure with superconducting electrodes

TL;DR

This paper calculates the energy-dependent density of states in a superconductor/ferromagnet/ferromagnet/superconductor structure, considering electron scattering and magnetic alignment, revealing how these factors influence DOS behavior.

Contribution

It introduces a detailed calculation of DOS in SFFS structures accounting for s-d scattering and magnetic configurations, advancing understanding of their electronic properties.

Findings

DOS varies with magnetic alignment (parallel vs antiparallel).

Exchange field strength significantly affects DOS features.

Electron scattering impacts the energy dependence of DOS.

Abstract

Energy variation of the density of states (DOS) has been calculated in the superconductor/ferromagnet/ferromagnet/superconductor structure (SFFS) in the frame of Gorkov equations taking into account the s-d electron scattering in the ferromagnetic layers. DOS behavior is presented for the antiparallel and parallel magnetic moments alignment of two adjacent F layers. The cases of small and large values of exchange ferromagnetic field are discussed.