Non-Local Transport Mediated by Spin-Supercurrents

TL;DR

This paper explores how spin supercurrents in ferromagnets with easy-plane anisotropy can mediate non-local spin transport, potentially enabling novel electronic device functionalities.

Contribution

It demonstrates the coupling of remote spin-mixing channels via spin supercurrents even with imperfect anisotropy, expanding understanding of spin transport mechanisms.

Findings

Spin supercurrents enable non-local spin transport.

Coupling persists despite imperfect anisotropy.

Potential for new spintronic device designs.

Abstract

In thin film ferromagnets with perfect easy-plane anisotropy, the component of total spin perpendicular to the easy plane is a good quantum number and the corresponding spin supercurrent can flow without dissipation. In this Letter we explain how spin supercurrents couple spatially remote spin-mixing vertical transport channels, even when easy-plane anisotropy is imperfect, and discuss the possibility that this effect can be used to fabricate new types of electronic devices.