Sr surface segregation and water cleaning for atomically controlled SrTiO3 (0 0 1) substrates studied by photoemission spectroscopy

D. Kobayashi, R. Hashimoto, A. Chikamatsu, H. Kumigashira, M. Oshima, T. Ohnishi, M. Lippmaa, K. Ono, M. Kawasaki, H. Koinuma

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The chemical properties and electronic structures of atomically flat SrTiO3 (0 0 1) 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. We demonstrate that the use of water-cleaning process is effective as a removal technique for Sr oxides segregated on TiO2-terminated surfaces with preserving the surface morphology and chemical bonding states of the topmost TiO2-terminated surfaces.

Original languageEnglish
Pages (from-to)443-446
Number of pages4
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume144-147
DOIs
Publication statusPublished - 2005 Jun 1
Externally publishedYes

Keywords

  • Photoemission spectroscopy
  • SrTiO substrates
  • TiO -terminated surface

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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