We evidence the possibility for coherent electrical manipulation of the spin orientation of topologically protected edge states in a low-symmetry quantum spin Hall insulator. By using a combination of ab-initio simulations, symmetry-based modeling, and large-scale calculations of the spin Hall conductivity, it is shown that small electric fields can efficiently vary the spin textures of edge currents in monolayer 1T'-WTe2 by up to a 90-degree spin rotation, without jeopardizing their topological character. These findings suggest a new kind of gate-controllable spin-based device, topologically protected against disorder and of relevance for the development of topological spintronics.
@article{arxiv.2209.08670,
title = {Electrical Control of Spin-polarized Topological Currents in Monolayer WTe$_2$},
author = {Jose H. Garcia and Jinxuan You and Monica García-Mota and Peter Koval and Pablo Ordejón and Ramón Cuadrado and Matthieu J. Verstraete and Zeila Zanolli and Stephan Roche},
journal= {arXiv preprint arXiv:2209.08670},
year = {2022}
}