Engineering the oxygen coordination in digital superlattices

Seyoung Cook, Tassie K. Andersen, Hawoong Hong, Richard A. Rosenberg, Laurence D. Marks, Dillon D. Fong

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The oxygen sublattice in complex oxides is typically composed of corner-shared polyhedra, with transition metals at their centers. The electronic and chemical properties of the oxide depend on the type and geometric arrangement of these polyhedra, which can be controlled through epitaxial synthesis. Here, we use oxide molecular beam epitaxy to create SrCoOx:SrTiO3 superlattices with tunable oxygen coordination environments and sublattice geometries. Using synchrotron X-ray scattering in combination with soft X-ray spectroscopy, we find that the chemical state of Co can be varied with the polyhedral arrangement, with higher Co oxidation states increasing the valence band maximum. This work demonstrates a new strategy for engineering unique electronic structures in the transition metal oxides using short-period superlattices.

Original languageEnglish (US)
Article number126101
JournalAPL Materials
Volume5
Issue number12
DOIs
StatePublished - Dec 1 2017

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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    Cook, S., Andersen, T. K., Hong, H., Rosenberg, R. A., Marks, L. D., & Fong, D. D. (2017). Engineering the oxygen coordination in digital superlattices. APL Materials, 5(12), [126101]. https://doi.org/10.1063/1.5007663