Electrical control of spin-polarized topological currents in monolayer WTe2

Jose H. Garcia, Jinxuan You, Mónica García-Mota, Peter Koval, Pablo Ordejón, Ramón Cuadrado, Matthieu J. Verstraete, Zeila Zanolli, Stephan Roche

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Abstract

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.

Original languageEnglish
Article numberL161410
Number of pages5
JournalPhysical Review B
Volume106
Issue number16
DOIs
Publication statusPublished - 21 Oct 2022

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