| Issue |
Europhys. Lett.
Volume 53, Number 4, February 2001
|
|
|---|---|---|
| Page(s) | 544 - 550 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2001-00187-x | |
| Published online | 01 December 2003 | |
Formation of d-holes in the initial stages of the oxidation of 
1
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
Received:
13
October
2000
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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