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

Autor:	K. Ono, Hiroshi Kumigashira, Hideomi Koinuma, Masaharu Oshima, Daisuke Kobayashi, Masashi Kawasaki, M. Lippmaa, Tsuyoshi Ohnishi
Rok vydání:	2004
Předmět:	Materials science X-ray photoelectron spectroscopy Annealing (metallurgy) Photoemission spectroscopy Analytical chemistry General Physics and Astronomy Synchrotron radiation Electronic structure Electronic band structure Isotropic etching Surface states
Zdroj:	Journal of Applied Physics. 96:7183-7188
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1814175
Popis:	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 TiO2-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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f49e70e63f43a92c0db178fc2a54ad72 https://doi.org/10.1063/1.1814175 Zobrazit plný text záznamu