Observation of spin-charge conversion in CVD-grown single-layer graphene

TL;DR

This paper demonstrates the conversion of pure spin current to charge current in large-area CVD-grown single-layer graphene via spin pumping, revealing an inverse spin Hall effect attributed to its spin-orbit interaction.

Contribution

It provides the first observation of spin-charge conversion in CVD-grown single-layer graphene and estimates its spin Hall angle.

Findings

Successful detection of inverse spin Hall effect in SLG

Estimated spin Hall angle of 6.1×10^-7 in SLG

Attribution of ISHE to non-negligible spin-orbit interaction

Abstract

Conversion of pure spin current to charge current in single-layer graphene (SLG) is investigated by using spin pumping. Large-area SLG grown by chemical vapor deposition is used for the conversion. Efficient spin accumulation in SLG by spin pumping enables observing an electromotive force produced by the inverse spin Hall effect (ISHE) of SLG. The spin Hall angle of SLG is estimated to be 6.1*10-7. The observed ISHE in SLG is ascribed to its non-negligible spin-orbit interaction in SLG.