Two-dimensional square and hexagonal oxide quasicrystal approximants in SrTiO<sub>3</sub> films grown on Pt(111)/Al<sub>2</sub>O<sub>3</sub>(0001)
Catalina Ruano Merchán, Thiago T. Dorini, Florian Brix, L. Pasquier, Maud Jullien, Daniel Pierre, Stéphane Andrieu, K. Dumesnil, Sorour Semsari Parapari, Sašo Šturm, J. Ledieu, M. Sicot, O. Copie, Émilie Gaudry, V. Fournée
Abstract
). This is attributed to charge transfer, from the most electropositive elements (Sr and Ti) to the most electronegative ones (Pt and O), and to hybridization with Pt-states. Density of states calculations indicate differences in the electronic structure of the two approximants, suggesting different chemical and physical properties. This all-thin-film approach may be useful to explore the formation of complex two-dimensional oxide phases in other metal-oxide combinations.
Topics & Concepts
Scanning tunneling microscopeQuasicrystalThin filmMaterials scienceElectron diffractionCrystallographyLattice constantLow-energy electron diffractionDiffractionStackingOxideCondensed matter physicsSquare tilingNanotechnologyOpticsChemistryGeometryPhysicsOrganic chemistryMathematicsGridMetallurgyElectronic and Structural Properties of OxidesQuasicrystal Structures and PropertiesFerroelectric and Piezoelectric Materials