Abstract
Two-dimensional (2D) materials such as topological insulators (TIs) are promising components for the design of spintronic devices, and this work offers a way to quantify their advantage. This article presents a study of the conversions between charge and spin currents based on the regular and inverse spin Hall effects in heavy metals, and based on the regular and inverse Edelstein effects in a 2D electron gas. The authors propose an approach for comparing the efficiency of conversion in 3D and 2D systems; this comparison is not straightforward, as those different physical effects are responsible at different dimensionalities. Spoiler: TIs turn out to be far more effective converters.
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