Title

UHV-Cleaved V2O3 (101¯2) by He I and He II UPS and XPS

Document Type

Article

Publication Date

7-1-1998

Abstract

V2O3 is a transition-metal oxide that exhibits a large metal-insulator transition at about 150 K. At room temperature, where these spectra were taken, it is metallic. Its metallic nature is evident both in the finite occupied density-of-states at the Fermi level, and in the double-peaked structure of the V 2p1/2 and 2p3/2 core-level peaks. The sample contains only V3+ cations, so the double-peaked structure does not arise from the presence of multiple valence states on the V cations. Caution must thus be exercised in interpreting cation 2p core-level spectra from such oxides. [See K. E. Smith and V. E. Henrich, Phys. Rev. B 50, 1382 (1994), for a discussion of the role of final-state screening in x-ray photoelectron spectroscopy core-level line shapes. See also R. L. Kurtz and V. E. Henrich, Surf. Sci. Spectra 5, 182 (1998).] The vanadium oxides exhibit a wide stoichiometry range (including Magneli phases); V2O3 is one the more stable lower oxides.

Publication Source (Journal or Book title)

Surface Science Spectra

First Page

172

Last Page

175

This document is currently not available here.

Share

COinS