| Issue |
Europhys. Lett.
Volume 40, Number 3, November I 1997
|
|
|---|---|---|
| Page(s) | 329 - 336 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00467-y | |
| Published online | 01 September 2002 | |
Local effects in electron capture processes of fluorine atoms interacting with an oxidised Mg surface
1
Laboratoire des Collisions Atomiques et Moléculaires (Unité de Recherche
associée au CNRS ), Université de Paris-Sud, Orsay, France
2
Physikalisches Institut der Technischen Universität Clausthal,
Leibnizstrasse 4, D-38678 Clausthal-Zellerfeld, Germany
Received:
22
January
1997
Accepted:
19
September
1997
Changes in electron capture rates during the oxidation of metal surfaces
are investigated on the example of 
formation in fluorine ion/atom scattering
on a Mg surface exposed to 
and also for MgO(100). In the low-coverage,
chemisorption range, formation decreases in spite of a decrease in the
surface work function. This is assigned to a local effect due to specifics
of the electronic structure at the adsorbate site, which is akin to surface
poisoning effects. At high exposures corresponding to oxide formation electron
capture is very efficient and can be understood in terms of a quasi-resonant
localised charge exchange mechanism between a F atom and a MgO lattice O
anion.
PACS: 79.20.Rf – Atomic, molecular, and ion beam impact and interactions with surfaces / 82.65.My – Chemisorption / 82.65.Jv – Heterogeneous catalysis at surfaces
© EDP Sciences, 1997
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.