Atomic scale investigation of a PbTiO3/SrRuO3/DyScO3 heterostructure

R. Egoavil, H. Tan, J. Verbeeck, S. Bals, B.F. Smith, Bouwe Kuiper, Augustinus J.H.M. Rijnders, Gertjan Koster, G. van Tendeloo

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Abstract

An epitaxial PbTiO3 thin film grown on self-organized crystalline SrRuO3 nanowires deposited on a DyScO3 substrate with ordered DyO and ScO2 chemical terminations is investigated by transmission electron microscopy. In this PbTiO3/SrRuO3/DyScO3 heterostructure, the SrRuO3 nanowires are assumed to grow on only one type of substrate termination. Here, we report on the structure, morphology, and chemical composition analysis of this heterostructure. Electron energy loss spectroscopy reveals the exact termination sequence in this complex structure. The energy loss near-edge structure of the Ti–L2,3, Sc–L2,3, and O K edges shows intrinsic interfacial electronic reconstruction. Furthermore, PbTiO3 domain walls are observed to start at the end of the nanowires resulting in atomic steps on the film surface
Original languageUndefined
Article number223106
Pages (from-to)-
Number of pages5
JournalApplied physics letters
Volume102
Issue number22
DOIs
Publication statusPublished - 2013

Keywords

  • IR-89739
  • METIS-296548

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