Evolution of polytypism in GaAs nanowires during growth revealed by time-resolved in situ x-ray diffraction

Philipp Schroth, Martin Köhl, Jean Wolfgang Hornung, Emmanouil Dimakis, Claudio Somaschini, Lutz Geelhaar, Andreas Biermanns, Sondes Bauer, Sergey Lazarev, Ullrich Pietsch, Tilo Baumbach

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In III-V nanowires the energetic barriers for nucleation in the zinc blende or wurtzite arrangement are typically of a similar order of magnitude. As a result, both arrangements can occur in a single wire. Here, we investigate the evolution of this polytypism in self-catalyzed GaAs nanowires on Si(111) grown by molecular beam epitaxy with time-resolved in situ x-ray diffraction. We interpret our data in the framework of a height dependent Markov model for the stacking in the nanowires. In this way, we extract the mean sizes of faultless wurtzite and zinc blende segments - a key parameter of polytypic nanowires - and their temporal evolution during growth. Thereby, we infer quantitative information on the differences of the nucleation barriers including their evolution without requiring a model of the nucleus.

Original languageEnglish
Article number055504
JournalPhysical Review Letters
Volume114
Issue number5
DOIs
Publication statusPublished - 5 Feb 2015
Externally publishedYes

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x ray diffraction
nanowires
wurtzite
zinc
nucleation
molecular beam epitaxy
wire
nuclei

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Schroth, P., Köhl, M., Hornung, J. W., Dimakis, E., Somaschini, C., Geelhaar, L., ... Baumbach, T. (2015). Evolution of polytypism in GaAs nanowires during growth revealed by time-resolved in situ x-ray diffraction. Physical Review Letters, 114(5), [055504]. https://doi.org/10.1103/PhysRevLett.114.055504

Evolution of polytypism in GaAs nanowires during growth revealed by time-resolved in situ x-ray diffraction. / Schroth, Philipp; Köhl, Martin; Hornung, Jean Wolfgang; Dimakis, Emmanouil; Somaschini, Claudio; Geelhaar, Lutz; Biermanns, Andreas; Bauer, Sondes; Lazarev, Sergey; Pietsch, Ullrich; Baumbach, Tilo.

In: Physical Review Letters, Vol. 114, No. 5, 055504, 05.02.2015.

Research output: Contribution to journalArticle

Schroth, P, Köhl, M, Hornung, JW, Dimakis, E, Somaschini, C, Geelhaar, L, Biermanns, A, Bauer, S, Lazarev, S, Pietsch, U & Baumbach, T 2015, 'Evolution of polytypism in GaAs nanowires during growth revealed by time-resolved in situ x-ray diffraction', Physical Review Letters, vol. 114, no. 5, 055504. https://doi.org/10.1103/PhysRevLett.114.055504
Schroth, Philipp ; Köhl, Martin ; Hornung, Jean Wolfgang ; Dimakis, Emmanouil ; Somaschini, Claudio ; Geelhaar, Lutz ; Biermanns, Andreas ; Bauer, Sondes ; Lazarev, Sergey ; Pietsch, Ullrich ; Baumbach, Tilo. / Evolution of polytypism in GaAs nanowires during growth revealed by time-resolved in situ x-ray diffraction. In: Physical Review Letters. 2015 ; Vol. 114, No. 5.
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