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Template-Assisted Scalable Nanowire Networks

Friedl, Martin; Cerveny, Kris; Weigele, Pirmin; Tütüncüoglu, Gozde; Martí-Sánchez, Sara; Huang, Chunyi; Patlatiuk, Taras; Potts, Heidi LU ; Sun, Zhiyuan and Hill, Megan O, et al. (2018) In Nano Letters 18(4). p.2666-2671
Abstract

Topological qubits based on Majorana Fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust to decoherence. Nanowires are a promising medium for hosting these kinds of qubits, though branched nanowires are needed to perform qubit manipulations. Here we report a gold-free templated growth of III-V nanowires by molecular beam epitaxy using an approach that enables patternable and highly regular branched nanowire arrays on a far greater scale than what has been reported thus far. Our approach relies on the lattice-mismatched growth of InAs on top of defect-free GaAs nanomembranes yielding laterally oriented, low-defect InAs and InGaAs nanowires whose... (More)

Topological qubits based on Majorana Fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust to decoherence. Nanowires are a promising medium for hosting these kinds of qubits, though branched nanowires are needed to perform qubit manipulations. Here we report a gold-free templated growth of III-V nanowires by molecular beam epitaxy using an approach that enables patternable and highly regular branched nanowire arrays on a far greater scale than what has been reported thus far. Our approach relies on the lattice-mismatched growth of InAs on top of defect-free GaAs nanomembranes yielding laterally oriented, low-defect InAs and InGaAs nanowires whose shapes are determined by surface and strain energy minimization. By controlling nanomembrane width and growth time, we demonstrate the formation of compositionally graded nanowires with cross-sections less than 50 nm. Scaling the nanowires below 20 nm leads to the formation of homogeneous InGaAs nanowires, which exhibit phase-coherent, quasi-1D quantum transport as shown by magnetoconductance measurements. These results are an important advance toward scalable topological quantum computing.

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type
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publication status
published
in
Nano Letters
volume
18
issue
4
pages
6 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85045206961
ISSN
1530-6992
DOI
10.1021/acs.nanolett.8b00554
language
English
LU publication?
no
id
356e4cf9-d8b0-4375-b201-63e00c414c05
date added to LUP
2019-05-15 09:51:06
date last changed
2019-11-13 05:32:36
@article{356e4cf9-d8b0-4375-b201-63e00c414c05,
  abstract     = {<p>Topological qubits based on Majorana Fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust to decoherence. Nanowires are a promising medium for hosting these kinds of qubits, though branched nanowires are needed to perform qubit manipulations. Here we report a gold-free templated growth of III-V nanowires by molecular beam epitaxy using an approach that enables patternable and highly regular branched nanowire arrays on a far greater scale than what has been reported thus far. Our approach relies on the lattice-mismatched growth of InAs on top of defect-free GaAs nanomembranes yielding laterally oriented, low-defect InAs and InGaAs nanowires whose shapes are determined by surface and strain energy minimization. By controlling nanomembrane width and growth time, we demonstrate the formation of compositionally graded nanowires with cross-sections less than 50 nm. Scaling the nanowires below 20 nm leads to the formation of homogeneous InGaAs nanowires, which exhibit phase-coherent, quasi-1D quantum transport as shown by magnetoconductance measurements. These results are an important advance toward scalable topological quantum computing.</p>},
  author       = {Friedl, Martin and Cerveny, Kris and Weigele, Pirmin and Tütüncüoglu, Gozde and Martí-Sánchez, Sara and Huang, Chunyi and Patlatiuk, Taras and Potts, Heidi and Sun, Zhiyuan and Hill, Megan O and Güniat, Lucas and Kim, Wonjong and Zamani, Mahdi and Dubrovskii, Vladimir G and Arbiol, Jordi and Lauhon, Lincoln J and Zumbühl, Dominik M and Fontcuberta I Morral, Anna},
  issn         = {1530-6992},
  language     = {eng},
  month        = {04},
  number       = {4},
  pages        = {2666--2671},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Nano Letters},
  title        = {Template-Assisted Scalable Nanowire Networks},
  url          = {http://dx.doi.org/10.1021/acs.nanolett.8b00554},
  volume       = {18},
  year         = {2018},
}