# Spin current generation in organic antiferromagnets

## TL;DR

This paper demonstrates that organic antiferromagnets can generate spin currents via thermal or electric stimuli without relying on spin-orbit coupling, opening new avenues in organic spintronics.

## Contribution

It reveals that organic antiferromagnets can produce spin currents independently of spin-orbit effects, a novel mechanism in spintronics.

## Key findings

- Organic antiferromagnets generate spin currents with thermal or electric stimuli.
- Spin current generation occurs despite vanishing spin-orbit coupling.
- Potential for organic materials to be used in spintronic devices.

## Abstract

Spin current--a flow of electron spins without a charge current--is an ideal information carrier free from Joule heating for electronic devices. The celebrated spin Hall effect, which arises from the relativistic spin-orbit coupling, enables us to generate and detect spin currents in inorganic materials and semiconductors, taking advantage of their constituent heavy atoms. In contrast, organic materials consisting of molecules with light elements have been believed to be unsuited for spin current generation. Here we show that a class of organic antiferromagnets with checker-plate type molecular arrangements can serve as a spin current generator by applying a thermal gradient or an electric field, even with vanishing spin-orbit coupling. Our findings provide another route to create a spin current distinct from the conventional spin Hall effect and open a new field of spintronics based on organic magnets having advantages of small spin scattering and long lifetime.