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Perfect Monolayers of the BaTiO 3 ‐Derived 2D Oxide Quasicrystals Investigated by Scanning Tunneling Microscopy and Noncontact Atomic Force Microscopy
Author(s) -
Zollner Eva Maria,
Schenk Sebastian,
Setvin Martin,
Förster Stefan
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900620
Subject(s) - quasicrystal , scanning tunneling microscope , atomic force microscopy , monolayer , conductive atomic force microscopy , materials science , oxide , microscopy , crystallography , condensed matter physics , square (algebra) , molecular physics , optics , nanotechnology , chemistry , physics , geometry , mathematics , metallurgy
The atomic structure of the BaTiO 3 ‐derived 2D oxide quasicrystals (OQCs) is investigated using scanning tunneling microscopy (STM) and noncontact atomic force microscopy (nc‐AFM). It is demonstrated that these extraordinary films can easily be prepared as single‐phase monolayers on a Pt(111) support. From analyzing almost 20 000 atomic vertices, an extended statistical dataset of the OQC tiling is collected. It manifests that the OQC obeys the statistics of the Niizeki–Gähler tiling, which is a dodecagonal triangle–square–rhomb model system. The atomic structure shown by nc‐AFM is identical to the contrast obtained in STM images. The results are discussed with respect to the existing structural models.