Long-range odd triplet superconductivity in SF structures with Neel walls

TL;DR

This paper investigates how odd triplet superconductivity can extend over long distances in superconductor/ferromagnet structures with Neel domain walls, revealing the role of domain wall magnetization in the superconducting properties.

Contribution

It demonstrates the emergence of long-range odd triplet components in SF structures with Neel walls and analyzes their spatial behavior within domains.

Findings

Long-range triplet component arises in domain walls.

The component spreads over a distance _T in the domains.

Density of states variation is influenced by magnetization rotation.

Abstract

We consider a multidomain superconductor/ferromagnet (SF) structure with an in-plane magnetization, assuming that the neighboring domains are separated by the Neel domain walls. We show that an odd triplet long-range component arises in the domain walls and spreads into domains over a long distance of the order \xi_T = \sqrt{D/2\pi T} (in the dirty limit). The density of states variation in the domains due to this component changes over distances of the order \xi_T and turns to zero in the middle of domains if the magnetization rotates in the same direction in all domain walls.