Unit Cell Structure of Crystal Polytypes in InAs and InSb Nanowires

Publication: Research - peer-reviewJournal article – Annual report year: 2011

  • Author: Kriegner, Dominik

    Johannes Kepler University of Linz

  • Author: Panse, Christian

    Friedrich-Schiller-Universität Jena, Institut für Festkörpertheorie und -optik

  • Author: Mandl, Bernhard

    Johannes Kepler University of Linz

  • Author: Dick, Kimberly A.

    Lund University

  • Author: Keplinger, Mario

    Johannes Kepler University of Linz

  • Author: Persson, Johan Mikael

    Center for Electron Nanoscopy, Technical University of Denmark

  • Author: Caroff, Philippe

    Lund University

  • Author: Ercolani, Daniele

    Scuola Normale Superiore di Pisa

  • Author: Sorba, Lucia

    Scuola Normale Superiore di Pisa

  • Author: Bechstedt, Friedhelm

    Friedrich-Schiller-Universität Jena, Institut für Festkörpertheorie und -optik

  • Author: Stangl, Julian

    Johannes Kepler University of Linz

  • Author: Bauer, Günther

    Johannes Kepler University of Linz

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The atomic distances in hexagonal polytypes of III−V compound semiconductors differ from the values expected from simply a change of the stacking sequence of (111) lattice planes. While these changes were difficult to quantify so far, we accurately determine the lattice parameters of zinc blende, wurtzite, and 4H polytypes for InAs and InSb nanowires, using X-ray diffraction and transmission electron microscopy. The results are compared to density functional theory calculations. Experiment and theory show that the occurrence of hexagonal bilayers tends to stretch the distances of atomic layers parallel to the c axis and to reduce the in-plane distances compared to those in zinc blende. The change of the lattice parameters scales linearly with the hexagonality of the polytype, defined as the fraction of bilayers with hexagonal character within one unit cell.
Original languageEnglish
JournalNano Letters
Publication date2011
Volume11
Issue4
Pages1483-1489
ISSN1530-6984
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 34

Keywords

  • Density functional theory, Crystal structure, Nanowires, Polytypes, X-ray diffraction
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