Selective-area growth is a promising technique for enabling of the fabrication of the scalable III\u2212V nanowire networks required to test proposals for Majorana-based quantum computing devices. However, the contours of the growth parameter window resulting in selective growth remain unde\ufb01ned. Herein, we present a set of experimental techniques that unambiguously establish the parameter space window resulting in selective III\u2212V nanowire networks growth by molecular beam epitaxy. Selectivity maps are constructed for both GaAs and InAs compounds based on in situ characterization of growth kinetics on GaAs(001) substrates, where the di\ufb00erence in group III adatom desorption rates between the III\u2212V surface and the amorphous mask area is identi\ufb01ed as the primary mechanism governing selectivity. The broad applicability of this method is demonstrated by the successful realization of high-quality InAs and GaAs nanowire networks on GaAs, InP, and InAs substrates of both (001) and (111)B orientations as well as homoepitaxial InSb nanowire networks. Finally, phase coherence in Aharonov\u2212Bohm ring experiments validates the potential of these crystals for nanoelectronics and quantum transport applications. This work should enable faster and better nanoscale crystal engineering over a range of compound semiconductors for improved device performance.<\/p>\n","protected":false},"excerpt":{"rendered":"
Selective-area growth is a promising technique for enabling of the fabrication of the scalable III\u2212V nanowire networks required to test proposals for Majorana-based quantum computing devices. However, the contours of the growth parameter window resulting in selective growth remain unde\ufb01ned. 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