Surface and interface chemical composition of thin epitaxial SrTiO 3 and BaTiO 3 films: Photoemission investigation

F. Amy, A. Wan, A. Kahn, F. J. Walker, R. A. McKee

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The effect of surface preparation on chemical and electronic film, and interface properties were studied using SrTiO 3 and BaTiO 3 films epitaxially grown on Si(100) substrates. It was found that while the valence band maximum shifts by more that 2 eV, the oxide core level shifts by less than 0.6 eV, depending on the surface treatment. It was also found that extremely careful cleaning procedures should be applied since the surface composition and film morphology are of paramount importance in determining the electronic structure of the crystalline oxides. It was shown that the interfaces between SrTiO 3 and BaTiO 3 and Si, which were unstable at annealing temperatures, required thorough cleaning and ordering.

Original languageEnglish (US)
Pages (from-to)1601-1606
Number of pages6
JournalJournal of Applied Physics
Volume96
Issue number3
DOIs
StatePublished - Aug 1 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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