X-ray photoelectron and Auger spectroscopy study of some vanadium oxides

G. A. Sawatzky and D. Post
Phys. Rev. B 20, 1546 – Published 15 August 1979
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Abstract

A detailed investigation of V2O5, VO2, V2O3, and V metal is presented. The vanadium core lines in the x-ray photoelectron spectra are anomalously wide for V2O3 and VO2. It is shown that this is a consequence of the narrow 3d band in these materials and the relatively strong core-hole 3d Coulomb interaction. The influence of electron correlation effects in the 3d band on the core linewidths is discussed. The valence bands are compared to band-structure calculations and the difference in the band structure above and below the semiconductor-metal transition is discussed. The Auger results are discussed in terms of the 3d partial density of states. It is found that there is a large amount of d character in the O2p region of the valence band. Also the average "on-site" Coulomb interaction of 3d electrons is obtained from the Auger spectra and is discussed in terms of electron correlation effects.

  • Received 1 December 1978

DOI:https://doi.org/10.1103/PhysRevB.20.1546

©1979 American Physical Society

Authors & Affiliations

G. A. Sawatzky and D. Post

  • Physical Chemistry Laboratory, Material Science Center, University of Groningen, The Netherlands

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Vol. 20, Iss. 4 — 15 August 1979

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