High-resolution synchrotron-radiation photoemission characterization for atomically-controlled SrTiO3(001) substrate surfaces subjected to various surface treatments

D. Kobayashi, H. Kumigashira, M. Oshima, T. Ohnishi, M. Lippmaa, K. Ono, M. Kawasaki, H. Koinuma

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36 Citations (Scopus)

Abstract

The chemical properties and electronic structures of atomically flat SrTiO3(001) substrates with various surface treatments have been investigated by high-resolution synchrotron-radiation photoemission spectroscopy. We have found that an annealing process causes the segregation of Sr oxides at the TiO2-terminated surface and that the TiO 2-terminated surface is more stable than the SrO terminated one. We demonstrate that the use of chemical etching process is effective as a removal technique for Sr oxides accumulating on TiO2-terminated surfaces and that the adding of a reetching process after annealing in an O2 environment is one of the best methods to obtain well defined and nearly perfect substrate surface.

Original languageEnglish
Article number6
Pages (from-to)7183-7188
Number of pages6
JournalJournal of Applied Physics
Volume96
Issue number12
DOIs
Publication statusPublished - 2004 Dec 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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