Schenk Sebastian, Förster Stefan, Meinel Klaus, Hammer René, Leibundgut Bettina, Paleschke Maximilian, Pantzer Jonas, Dresler Christoph, Schumann Florian O, Widdra Wolf
Institute of Physics, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany.
J Phys Condens Matter. 2017 Apr 5;29(13):134002. doi: 10.1088/1361-648X/aa5bdb. Epub 2017 Jan 31.
We report on the formation of a SrTiO-derived dodecagonal oxide quasicrystal (OQC) at the interface to Pt(1 1 1). This is the second observation of a two-dimensional quasicrystal in the class of oxides. The SrTiO-derived OQC exhibits strong similarities to the BaTiO-derived OQC with respect to the local tiling geometry. However, the characteristic length scale of the SrTiO-derived OQC is 1.8% smaller. Coexisting with the OQC a large scale approximant structure with a monoclinic unit cell is identified. It demonstrates the extraordinary level of complexity that oxide approximant structures can reach.
我们报道了在与Pt(1 1 1)的界面处形成的一种源自SrTiO的十二边形氧化物准晶体（OQC）。这是在氧化物类别中对二维准晶体的第二次观测。源自SrTiO的OQC在局部平铺几何结构方面与源自BaTiO的OQC表现出很强的相似性。然而，源自SrTiO的OQC的特征长度尺度小1.8%。与OQC共存的是一种具有单斜晶胞的大规模近似结构。它展示了氧化物近似结构所能达到的非凡复杂程度。
