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  A resonant photoemission study of the ZrO2 valence band

Sam, J., Gonzalez-Elipe, A., Fernández, A., Leinen, D., Galan, L., Stampfl, A., et al. (1994). A resonant photoemission study of the ZrO2 valence band. Surface Science, 307-309(B), 848-853. doi:10.1016/0039-6028(94)91502-4.

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 Creators:
Sam, J.M.1, Author
Gonzalez-Elipe, A.R.2, Author
Fernández, A.2, Author
Leinen, D.2, Author
Galan, L.1, Author
Stampfl, A.3, Author           
Bradshaw, Alexander M.3, Author           
Affiliations:
1Departamento Física Aplicada C-XII, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain, ou_persistent22              
2Instituto Ciencia de Materiales de Sevilla (CSIC-Uni. Sevilla), and Departamento Química Inorgánica, PO Box 1115, E-41071 Sevilla, Spain, ou_persistent22              
3Fritz Haber Institute, Max Planck Society, ou_24021              

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 Abstract: Valence band photoemission spectra have been measured from in situ thermally grown ZrO2 using synchrotron radiation. Resonant photoemission was observed at photon energies hv ≈ 39 eV, well above the Zr4p → 4d threshold. The phenomenon has been used to identify the Zr 4d derived valence states and good agreement was found with valence band structure calculations. Ar+ bombardment of ZrO2 causes the growth of an emission feature in the band gap at a binding energy of 1.5 eV associated with oxygen vacancies as well as a second band at 3.5 eV and other changes in the O 2p band, all of which are clearly associated with the formation of a highly oxygen deficient surface layer. Resonant photoemission of the bombarded oxide not only demonstrates the d-character of the states in the band gap but also shows a significant increase of the Zr contribution to the O2p band.

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Language(s): eng - English
 Dates: 1993-08-201994-04-20
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/0039-6028(94)91502-4
 Degree: -

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Title: Surface Science
  Abbreviation : Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 6 Volume / Issue: 307-309 (B) Sequence Number: - Start / End Page: 848 - 853 Identifier: ISSN: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028