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This is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
(a) Optical image of the back-gate GaAs:Mg nanowire FET device. The inset shows an illustrative TEM image of a Mg-doped GaAs nanowire showing the characteristic alternated WZ/BZ segments. (b) Schematic of the back-gated FET device.