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http://dx.doi.org/10.25673/73445
Titel: | Antiphase domain boundary formation in 2D Ba–Ti–O on Pd(111) : an alternative to phase separation |
Autor(en): | Wührl, Friederike Elisa Krahn, Oliver Schenk, Sebastian Förster, Stefan Widdra, Wolf |
Erscheinungsdatum: | 2022 |
Art: | Artikel |
Sprache: | Englisch |
Zusammenfassung: | 2D oxide quasicrystals (OQCs) are unique structures arising from atoms positioned at the vertices of a dodecagonal triangle–square–rhombus tiling. The prototypical example for OQCs is derived from BaTiO3 on Pt(111). Herein, scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED) investigations of 2D oxide layers derived from BaTiO3 on Pd(111) are reported. Upon ultrahigh vacuum (UHV) annealing, different long-range ordered structures are observed with a base of four vertex atoms forming two edge-sharing equilateral triangles. By a periodic repetition of this base in either quadratic or rectangular unit cells, a triangle–square tiling (known as σ-phase approximant or 32.4.3.4 Archimedean tiling) or a triangle–rhombus tiling is formed. Both structures vary strongly in their vertex density. In addition, the formation of antiphase domain boundaries in the σ phase is observed resulting in a well-ordered incorporation of rhombuses in the triangle–square tiling. A systematic variation of the frequency of these domain boundaries is identified as a mechanism for an incremental increase in the global vertex density, mediating between pure triangle–square and triangle–square–rhombus tilings. |
URI: | https://opendata.uni-halle.de//handle/1981185920/75397 http://dx.doi.org/10.25673/73445 |
Open-Access: | ![]() |
Nutzungslizenz: | ![]() |
Sponsor/Geldgeber: | Publikationsfonds MLU |
Journal Titel: | Physica status solidi / B |
Verlag: | Wiley-VCH |
Verlagsort: | Weinheim |
Band: | 259 |
Heft: | 1 |
Originalveröffentlichung: | 10.1002/pssb.202100389 |
Enthalten in den Sammlungen: | Open Access Publikationen der MLU |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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Physica Status Solidi b - 2021 - W hrl - Antiphase Domain Boundary Formation in 2D Ba Ti O on Pd 111 An Alternative to.pdf | 2.42 MB | Adobe PDF | ![]() Öffnen/Anzeigen |