15-18 March 2021
DESY
Europe/Berlin timezone

Insitu X-ray analysis of misfit strain and curvature of bent polytypic InxGa1-xAs/GaAs core/shell nanowires

18 Mar 2021, 10:55
20m
https://desy.zoom.us/j/97195167153

https://desy.zoom.us/j/97195167153

Oral contribution In situ / in operando studies In situ / in operando studies

Speaker

Mahmoud Al-Humaidi (Solid State Physics, University of Siegen and 2 Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology)

Description

Misfit strain in crystalline core-shell nanowires can be elastically released by nanowire curvature in case of inhomogeneous shell growth around the nanowires 1. In this work, we performed time-resolved in-situ XRD investigations of the evolution of GaAs nanowires bending during the asymmetric growth of InxGa1-xAs shell without substrate rotation. By means of micro X-ray beam at beamline P23 and P09 at PETRA-III at DESY and a portable molecular beam epitaxy chamber (pMBE)2, this study gives insight into the temporal development of the bending as well as the strain in the core-shell nanowire. In particular, different bending directions of nanowires grown on Si with native oxide and thermal oxide were observed and the demonstration of the nanowire curvature as function of shell thickness showed nonlinear dependency.

References
1 Lewis R B, Corfdir P, Küpers H, Flissikowski T, Brandt O and Geelhaar L 2018, Nano Lett. 18 2343–50
2 Slobodskyy T, Schroth P, Grigoriev D, Minkevich A A, Hu D Z, Schaadt D M and Baumbach T 2012, Review of Scientific Instruments vol 83

Primary author

Mahmoud Al-Humaidi (Solid State Physics, University of Siegen and 2 Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology)

Co-authors

Julian Feigl (2 Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology) Julian Jakob (Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology and Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology) Philipp Schroth (Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology and 3 Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology) Ali AlHassan (Solid State Physics, University of Siegen and 2 Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology) Arman Davtyan (Solid State Physics, University of Siegen) Jesús Herranz (4 Paul Drude Institut für Festkorperelektronik, Leibniz Institut im Forschungsverbund Berlin e.V.,) Abbes Tahraoui (4 Paul Drude Institut für Festkorperelektronik, Leibniz Institut im Forschungsverbund Berlin e.V.) Dmitri Novikov (DESY) Tilo Baumbach (Karlsruhe Institute of Technology) Lutz Geelhaar (Paul Drude Institut für Festkorperelektronik, Leibniz Institut im Forschungsverbund Berlin e.V., ) Ulrich Pietsch (Solid State Physics, University of Siegen)

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