Absence of a giant spin Hall effect in plasma-hydrogenated graphene
Mesoscale and Nanoscale Physics
2019-02-06 v1
Abstract
The weak spin-orbit interaction in graphene was predicted to be increased, e.g., by hydrogenation. This should result in a sizable spin Hall effect (SHE). We employ two different methods to examine the spin Hall effect in weakly hydrogenated graphene. For hydrogenation we expose graphene to a hydrogen plasma and use Raman spectroscopy to characterize this method. We then investigate the SHE of hydrogenated graphene in the H-bar method and by direct measurements of the inverse SHE. Although a large nonlocal resistance can be observed in the H-bar structure, comparison with the results of the other method indicate that this nonlocal resistance is caused by a non-spin-related origin.
Cite
@article{arxiv.1809.10475,
title = {Absence of a giant spin Hall effect in plasma-hydrogenated graphene},
author = {Tobias Völkl and Denis Kochan and Thomas Ebnet and Sebastian Ringer and Daniel Schiermeier and Philipp Nagler and Tobias Korn and Christian Schüller and Jaroslav Fabian and Dieter Weiss and Jonathan Eroms},
journal= {arXiv preprint arXiv:1809.10475},
year = {2019}
}