title: Observation of a dodecagonal oxide quasicrystal and its complex approximant in the SrTiO3-Pt(1 1 1) system.
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.
authors.affiliation: Institute of Physics, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Schenk
authors.forename: Stefan
authors.initials: S
authors.lastname: Förster
authors.forename: Klaus
authors.initials: K
authors.lastname: Meinel
authors.forename: René
authors.initials: R
authors.lastname: Hammer
authors.forename: Bettina
authors.initials: B
authors.lastname: Leibundgut
authors.forename: Maximilian
authors.initials: M
authors.lastname: Paleschke
authors.forename: Jonas
authors.initials: J
authors.lastname: Pantzer
authors.forename: Christoph
authors.initials: C
authors.lastname: Dresler
authors.forename: Florian O
authors.initials: FO
authors.lastname: Schumann
authors.forename: Wolf
authors.initials: W
authors.lastname: Widdra