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.
|Number of pages||4|
|Journal||Journal of Electron Spectroscopy and Related Phenomena|
|Publication status||Published - 2005 Jun|
- Photoemission spectroscopy
- SrTiO substrates
- TiO -terminated surface