Volume 53, Number 4, February 2001
|Page(s)||544 - 550|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 December 2003|
Formation of d-holes in the initial stages of the oxidation of
INFM, Unità di Milano-Bicocca and
Dipartimento di Scienza
dei Materiali Università di Milano Bicocca - Milano, Italy
2 INFM and Centro di Fisica delle Superfici e Basse Temperature del CNR Dipartimento di Fisica, Università di Genova - Genova, Italy
Accepted: 6 December 2000
We demonstrate that double ionisation of the atoms, leading to the formation of d-holes, takes place in the initial oxidation stage of (001). The complex formed by the ion, two oxygen adatoms and one oxygen atom in the octahedral interstitial gives rise to a dipole active electron energy loss at 130. Signature of the electronic origin of this loss is the inverse isotope shift and the peculiar temperature dependence of the energy loss, which can be reproduced by a theoretical model.
PACS: 82.65.My – Chemisorption / 34.50.Lf – Chemical reactions, energy disposal, and angular distribution, as studied by atomic and molecular beams
© EDP Sciences, 2001
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