Influence of s-d scattering on the electron density of states in ferromagnet/superconductor bilayer

TL;DR

This paper investigates how s-d scattering influences the electron density of states in ferromagnet/superconductor bilayers, revealing that s-d scattering causes larger oscillation periods and more significant decreases in DOS.

Contribution

It introduces a third-order s-d scattering model to analyze DOS oscillations in FM/SC bilayers, highlighting the impact of s-d scattering on electronic properties.

Findings

s-d scattering increases oscillation period of DOS

oscillation amplitude decreases more rapidly with s-d scattering

third-order scattering effects are significant in DOS behavior

Abstract

We study the dependence of the electronic density of states (DOS) on the distance from the boundary for a ferromagnet/superconductor bilayer. We calculate the electron density of states in such structure taking into account the two-band model of the ferromagnet (FM) with conducting s and localized d electrons and a simple s-wave superconductor (SC). It is demonstrated that due to the electron s-d scattering in the ferromagnetic layer in the third order of s-d scattering parameter the oscillation of the density of states has larger period and more drastic decrease in comparison with the oscillation period for the electron density of states in the zero order.