TY - GEN A1 - Förster, Stefan A1 - Schenk, Sebastian A1 - Zollner, Eva Maria A1 - Krahn, Oliver A1 - Chiang, Cheng-Tien A1 - Schumann, Florian O. A1 - Bayat, Alireza A1 - Schindler, Karl-Michael A1 - Trautmann, Martin A1 - Hammer, René A1 - Meinel, Klaus A1 - Adeagbo, Waheed A. A1 - Hergert, Wolfram A1 - Flege, Jan Ingo A1 - Falta, Jens A1 - Ellguth, Martin A1 - Tusche, Christian A1 - DeBoissieu, Marc A1 - Muntwiler, Matthias A1 - Gerber, Thomas A1 - Widdra, Wolf T1 - Quasicrystals and their Approximants in 2D Ternary Oxides T2 - Physia Status Solidi B N2 - 2D oxide quasicrystals (OQCs) are recently discovered aperiodic, but well-ordered oxide interfaces. In this topical review, an introduction to these new thin-film systems is given. The concept of quasicrystals and their approximants is explained for BaTiO3 and SrTiO3 derived OQCs and related periodic structures in these 2D oxides. In situ microscopy unravels the high-temperature formation process of OQCs on Pt(111). The dodecagonal structure is discussed regarding tiling statistics and tiling decoration based on the results of atomically resolved scanning tunneling microscopy and various diffraction techniques. In addition, angle-resolved ultraviolet photoemission spectroscopy and X-ray photoelectron spectroscopy results prove a metallic character of the 2D oxide. KW - approximants KW - dodecagonal oxide quasicrystals KW - oxide quasicrystals KW - tiling statistics Y1 - 2020 U6 - https://doi.org/10.1002/pssb.201900624 SN - 0370-1972 SN - 1521-3951 VL - 257 IS - 7 ER -