Spin current generation in organic antiferromagnets

Makoto Naka (), Satoru Hayami, Hiroaki Kusunose, Yuki Yanagi, Yukitoshi Motome and Hitoshi Seo
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Makoto Naka: Waseda University
Satoru Hayami: Hokkaido University
Hiroaki Kusunose: Meiji University
Yuki Yanagi: Tohoku University
Yukitoshi Motome: The University of Tokyo
Hitoshi Seo: RIKEN

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: 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.

Date: 2019
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DOI: 10.1038/s41467-019-12229-y

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