Sub-Band Spectrum Engineering via Structural Order in Tapered Nanowires

The cross-sectional dimensions of nanowires set the quantization conditions for the electronic subbands they host. These can be used as a platform to realize one-dimesional topological superconductivity. Here we develop a protocol that forces such nanowires to kink and change their growth direction....

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Published in:Nano letters 2021-12, Vol.21 (24), p.10215-10221
Main Authors: Song, Man Suk, Koren, Tom, Załuska-Kotur, Magdalena, Buczko, Ryszard, Avraham, Nurit, Kacman, Perla, Shtrikman, Hadas, Beidenkopf, Haim
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cited_by cdi_FETCH-LOGICAL-a449t-7625994d8e1b26d482e3fac3f5afe88d2b474ec57910e2a4687686932a15dd643
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container_end_page 10221
container_issue 24
container_start_page 10215
container_title Nano letters
container_volume 21
creator Song, Man Suk
Koren, Tom
Załuska-Kotur, Magdalena
Buczko, Ryszard
Avraham, Nurit
Kacman, Perla
Shtrikman, Hadas
Beidenkopf, Haim
description The cross-sectional dimensions of nanowires set the quantization conditions for the electronic subbands they host. These can be used as a platform to realize one-dimesional topological superconductivity. Here we develop a protocol that forces such nanowires to kink and change their growth direction. Consequently, a thin rectangular nanoplate is formed, which gradually converges into a very thin square tip. We characterize the resulting tapered nanowires structurally and spectroscopically by scanning and transmission electron microscopy and scanning tunneling microscopy and spectroscopy and model their growth. A unique structure composed of ordered rows of atoms on the (110) facet of the nanoflag is further revealed by atomically resolved topography and modeled by simulations. We discuss possible advantages tapered InAs nanowires offer for Majorana zero-mode realization and manipulation.
doi_str_mv 10.1021/acs.nanolett.1c03071
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subjects Letter
title Sub-Band Spectrum Engineering via Structural Order in Tapered Nanowires
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