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Structural Investigations of Core-shell Nanowires Using Grazing Incidence X-ray Diffraction.

Keplinger, Mario; Mårtensson, Thomas LU ; Stangl, Julian; Wintersberger, Eugen; Mandl, Bernhard; Kriegner, Dominik; Holý, Václav; Bauer, Günther; Deppert, Knut LU and Samuelson, Lars LU (2009) In Nano Letters 9(5). p.1877-1882
Abstract
The fabrication of core-shell structures is crucial for many nanowire device concepts. For the proper tailoring of their electronic properties, control of structural parameters such as shape, size, diameter of core and shell, their chemical composition, and information on their strain fields is mandatory. Using synchrotron X-ray diffraction studies and finite element simulations, we determined the chemical composition, dimensions, and strain distribution for series of InAs/InAsP core-shell wires grown on Si(111) with systematically varied growth parameters. In particular we detect initiation of plastic relaxation of these structures with increasing shell thickness and/or increasing phosphorus content. We establish a phase diagram, defining... (More)
The fabrication of core-shell structures is crucial for many nanowire device concepts. For the proper tailoring of their electronic properties, control of structural parameters such as shape, size, diameter of core and shell, their chemical composition, and information on their strain fields is mandatory. Using synchrotron X-ray diffraction studies and finite element simulations, we determined the chemical composition, dimensions, and strain distribution for series of InAs/InAsP core-shell wires grown on Si(111) with systematically varied growth parameters. In particular we detect initiation of plastic relaxation of these structures with increasing shell thickness and/or increasing phosphorus content. We establish a phase diagram, defining the region of parameters leading to pseudomorphic nanowire growth. This is important to avoid extended defects which are detrimental for their electronic properties. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
9
issue
5
pages
1877 - 1882
publisher
The American Chemical Society
external identifiers
  • wos:000266157100027
  • pmid:19320494
  • scopus:66449091728
ISSN
1530-6992
DOI
10.1021/nl803881b
language
English
LU publication?
yes
id
86ca628c-2867-4fa2-8e24-a5b7b353d255 (old id 1367469)
date added to LUP
2009-04-07 08:18:41
date last changed
2017-09-17 06:16:29
@article{86ca628c-2867-4fa2-8e24-a5b7b353d255,
  abstract     = {The fabrication of core-shell structures is crucial for many nanowire device concepts. For the proper tailoring of their electronic properties, control of structural parameters such as shape, size, diameter of core and shell, their chemical composition, and information on their strain fields is mandatory. Using synchrotron X-ray diffraction studies and finite element simulations, we determined the chemical composition, dimensions, and strain distribution for series of InAs/InAsP core-shell wires grown on Si(111) with systematically varied growth parameters. In particular we detect initiation of plastic relaxation of these structures with increasing shell thickness and/or increasing phosphorus content. We establish a phase diagram, defining the region of parameters leading to pseudomorphic nanowire growth. This is important to avoid extended defects which are detrimental for their electronic properties.},
  author       = {Keplinger, Mario and Mårtensson, Thomas and Stangl, Julian and Wintersberger, Eugen and Mandl, Bernhard and Kriegner, Dominik and Holý, Václav and Bauer, Günther and Deppert, Knut and Samuelson, Lars},
  issn         = {1530-6992},
  language     = {eng},
  number       = {5},
  pages        = {1877--1882},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Structural Investigations of Core-shell Nanowires Using Grazing Incidence X-ray Diffraction.},
  url          = {http://dx.doi.org/10.1021/nl803881b},
  volume       = {9},
  year         = {2009},
}