Gate-tunable spin-galvanic effect in graphene-topological insulator van der Waals heterostructures at room temperature
Journal article, 2020

Unique electronic spin textures in topological states of matter are promising for emerging spin-orbit driven memory and logic technologies. However, there are several challenges related to the enhancement of their performance, electrical gate-tunability, interference from trivial bulk states, and heterostructure interfaces. We address these challenges by integrating two-dimensional graphene with a three-dimensional topological insulator (TI) in van der Waals heterostructures to take advantage of their remarkable spintronic properties and engineer proximity-induced spin-charge conversion phenomena. In these heterostructures, we experimentally demonstrate a gate-tunable spin-galvanic effect (SGE) at room temperature, allowing for efficient conversion of a non-equilibrium spin polarization into a transverse charge current. Systematic measurements of SGE in various device geometries via a spin switch, spin precession, and magnetization rotation experiments establish the robustness of spin-charge conversion in the Gr-TI heterostructures. Importantly, using a gate voltage, we reveal a strong electric field tunability of both amplitude and sign of the spin-galvanic signal. These findings provide an efficient route for realizing all-electrical and gate-tunable spin-orbit technology using TIs and graphene in heterostructures, which can enhance the performance and reduce power dissipation in spintronic circuits.



electric field

three-dimensional modeling

temperature effect



Dmitrii Khokhriakov

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics


Anamul Md Hoque

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics


Bogdan Karpiak


Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Saroj Prasad Dash


Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Nature Communications

2041-1723 (ISSN)

Vol. 11 1 3657

Graphene Core Project 3 (Graphene Flagship)

European Commission (EC), 2020-04-01 -- 2023-03-31.

Inducerade Spin Strukturer i var der Waals Heterostrukturer

Swedish Research Council (VR), 2015-12-01 -- 2017-12-31.

Graphene Core Project 2 (Graphene Flagship)

European Commission (EC), 2018-04-01 -- 2020-03-31.

Graphene Core Project 1. Graphene-based disruptive technologies (Graphene Flagship)

European Commission (EC), 2016-04-01 -- 2018-03-31.

Spin kommunikation i Dirac Material heterostrukturer

Swedish Research Council (VR), 2017-01-01 -- 2020-12-31.

Subject Categories

Other Physics Topics

Nano Technology

Other Electrical Engineering, Electronic Engineering, Information Engineering

Condensed Matter Physics


Nanofabrication Laboratory



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