Tuning the Structure of Ultrathin ${\mathrm{BaTiO}}_{3}$ Films on Me(001) ($\mathrm{Me}=\mathrm{Fe}$, Pd, Pt) Surfaces

Tuning the Structure of Ultrathin ${BaTiO}_{3}$ Films on Me(001) ( $Me = Fe$ , Pd, Pt) Surfaces

H. L. Meyerheim, A. Ernst, K. Mohseni, I. V. Maznichenko, J. Henk, S. Ostanin, N. Jedrecy, F. Klimenta, J. Zegenhagen, C. Schlueter, I. Mertig, and J. Kirschner

Phys. Rev. Lett. 111, 105501 – Published 4 September 2013

Abstract

Using surface x-ray diffraction in combination with ab initio calculations, we demonstrate that the atomic structure of ultrathin ${BaTiO}_{3}$ (BTO) films grown on Me(001) surfaces ( $Me = Fe$ , Pd, Pt) depends on subtle modifications of the interface chemical composition. A complete reversal of the surface termination from a BaO- [BTO on Fe(001)] to a ${TiO}_{2}$ -terminated film [BTO on Pt(001)] is observed which goes in parallel with the adsorption of submonolayer amounts of oxygen at metal hollow sites of the interface. Our results may suggest a new route to an overall control of both the surface and the interface geometry in ${BaTiO}_{3} / metal$ contacts.

Received 25 November 2012

DOI:https://doi.org/10.1103/PhysRevLett.111.105501

Authors & Affiliations

H. L. Meyerheim^1,*, A. Ernst^1,5,†, K. Mohseni¹, I. V. Maznichenko², J. Henk², S. Ostanin¹, N. Jedrecy³, F. Klimenta¹, J. Zegenhagen⁴, C. Schlueter⁴, I. Mertig^1,2, and J. Kirschner^1,2

¹Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
²Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle, Germany
³Institut des Nano Sciences de Paris, UPMC-Sorbonne Universités, CNRS-UMR7588, 75005 Paris, France
⁴ESRF, Boîte Postale 220, F-38043 Grenoble Cedex, France
⁵Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstraße 2, 04103 Leipzig, Germany

^*hmeyerhm@mpi-halle.de
^†aernst@mpi-halle.de

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Vol. 111, Iss. 10 — 6 September 2013

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Physical Review Letters

Tuning the Structure of Ultrathin BaTiO3 Films on Me(001) (Me=Fe, Pd, Pt) Surfaces

H. L. Meyerheim, A. Ernst, K. Mohseni, I. V. Maznichenko, J. Henk, S. Ostanin, N. Jedrecy, F. Klimenta, J. Zegenhagen, C. Schlueter, I. Mertig, and J. Kirschner

Phys. Rev. Lett. 111, 105501 – Published 4 September 2013

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Tuning the Structure of Ultrathin ${BaTiO}_{3}$ Films on Me(001) ( $Me = Fe$ , Pd, Pt) Surfaces