Structure and composition of linear TiO x nanostructures on SrTiO 3(001)

Matthew S.J. Marshall*, Andres E. Becerra-Toledo, David J. Payne, Russell G. Egdell, Laurence D. Marks, Martin R. Castell

*Corresponding author for this work

Research output: Contribution to journalArticle

16 Scopus citations


High-resolution x-ray photoelectron spectroscopy (XPS) was performed on the surface of 0.7 at.% Nb-doped SrTiO 3(001) decorated with self-assembled linear nanostructures termed dilines, trilines, and tetralines. All three nanoline types share a common side-row feature, while the triline is shown to contain Ti in the 2+ oxidation state as a structural component of the linear backbone. Atomic-resolution scanning tunneling microscopy images and models developed using density functional theory are used to relate the structures to the spectroscopic data, showing that the nanolines consist of a three-layer hill and valley-type structure. Valence band XPS reveals the presence of a well-defined mid-band-gap state at approximately 1 eV, which emerges as a result of nanoline formation.

Original languageEnglish (US)
Article number125416
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number12
StatePublished - Sep 10 2012

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Marshall, M. S. J., Becerra-Toledo, A. E., Payne, D. J., Egdell, R. G., Marks, L. D., & Castell, M. R. (2012). Structure and composition of linear TiO x nanostructures on SrTiO 3(001). Physical Review B - Condensed Matter and Materials Physics, 86(12), [125416].