Threefold rotational symmetry in hexagonally shaped core-shell (In,Ga) As/GaAs nanowires revealed by coherent X-ray diffraction imaging

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10363583" target="_blank" >RIV/00216208:11320/17:10363583 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1107/S1600576717004149" target="_blank" >http://dx.doi.org/10.1107/S1600576717004149</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1107/S1600576717004149" target="_blank" >10.1107/S1600576717004149</a>

Result language

angličtina

Original language name

Threefold rotational symmetry in hexagonally shaped core-shell (In,Ga) As/GaAs nanowires revealed by coherent X-ray diffraction imaging

Original language description

Coherent X-ray diffraction imaging at symmetric hhh Bragg reflections was used to resolve the structure of GaAs/In0.15Ga0.85As/GaAs core-shell-shell nanowires grown on a silicon (111) substrate. Diffraction amplitudes in the vicinity of GaAs 111 and GaAs 333 reflections were used to reconstruct the lost phase information. It is demonstrated that the structure of the core-shell-shell nanowire can be identified by means of phase contrast. Interestingly, it is found that both scattered intensity in the (111) plane and the reconstructed scattering phase show an additional threefold symmetry superimposed with the shape function of the investigated hexagonal nanowires. In order to find the origin of this threefold symmetry, elasticity calculations were performed using the finite element method and subsequent kinematic diffraction simulations. These suggest that a non-hexagonal (In, Ga) As shell covering the hexagonal GaAs core might be responsible for the observation.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Applied Crystallography [online]

ISSN

1600-5767

e-ISSN

—

Volume of the periodical

50

Issue of the periodical within the volume

červen

Country of publishing house

JP - JAPAN

Number of pages

8

Pages from-to

673-680

UT code for WoS article

000402701600002

EID of the result in the Scopus database

2-s2.0-85020198122