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2D honeycomb transformation into dodecagonal quasicrystals driven by electrostatic forces

Author

Listed:
  • Sebastian Schenk

    (Martin-Luther-Universität Halle-Wittenberg)

  • Oliver Krahn

    (Martin-Luther-Universität Halle-Wittenberg)

  • Eric Cockayne

    (National Institute of Standards and Technology)

  • Holger L. Meyerheim

    (Max Planck Institute of Microstructure Physics)

  • Marc Boissieu

    (Universite Grenoble Alpes, CNRS, SIMaP)

  • Stefan Förster

    (Martin-Luther-Universität Halle-Wittenberg)

  • Wolf Widdra

    (Martin-Luther-Universität Halle-Wittenberg)

Abstract

Dodecagonal oxide quasicrystals are well established as examples of long-range aperiodic order in two dimensions. However, despite investigations by scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), low-energy electron microscopy (LEEM), photoemission spectroscopy as well as density functional theory (DFT), their structure is still controversial. Furthermore, the principles that guide the formation of quasicrystals (QCs) in oxides are elusive since the principles that are known to drive metallic QCs are expected to fail for oxides. Here we demonstrate the solution of the oxide QC structure by synchrotron-radiation based surface x-ray diffraction (SXRD) refinement of its largest-known approximant. The oxide QC formation is forced by large alkaline earth metal atoms and the reduction of their mutual electrostatic repulsion. It drives the n = 6 structure of the 2D Ti2O3 honeycomb arrangement via Stone–Wales transformations into an ordered structure with empty n = 4, singly occupied n = 7 and doubly occupied n = 10 rings, as supported by DFT.

Suggested Citation

  • Sebastian Schenk & Oliver Krahn & Eric Cockayne & Holger L. Meyerheim & Marc Boissieu & Stefan Förster & Wolf Widdra, 2022. "2D honeycomb transformation into dodecagonal quasicrystals driven by electrostatic forces," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35308-z
    DOI: 10.1038/s41467-022-35308-z
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    References listed on IDEAS

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    1. Stefan Förster & Klaus Meinel & René Hammer & Martin Trautmann & Wolf Widdra, 2013. "Quasicrystalline structure formation in a classical crystalline thin-film system," Nature, Nature, vol. 502(7470), pages 215-218, October.
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