Observation of a dodecagonal oxide quasicrystal and its complex approximant in the SrTiO3-Pt(1 1 1) system. (23rd February 2017)

• Record Type: Journal Article
• Authors: Schenk, Sebastian; Förster, Stefan; Meinel, Klaus; Hammer, René; Leibundgut, Bettina; Paleschke, Maximilian; Pantzer, Jonas; Dresler, Christoph; Schumann, Florian O; Widdra, Wolf
• Is Part Of: Journal of physics. Volume 29:Number 13(2017)
• Publication Date: 2017-02-23
• Subjects: oxide quasicrystal -- SrTiO3 -- STM -- LEED; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa5bdb
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We report on the formation of a SrTiO3 -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 SrTiO3 -derived OQC exhibits strong similarities to the BaTiO3 -derived OQC with respect to the local tiling geometry. However, the characteristic length scale of the SrTiO3 -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.