Positron surface states on clean and oxidized Al and in surface vacancies

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  • University of Jyväskylä

Abstract

This Letter reports on the first discrete-lattice calculation of positron surface states on the surfaces of Al. The authors reproduce the observed values and anisotropy of the binding energies on clean surfaces, and predict the surface-state lifetimes. The temperature-independent lateral diffusion constant is calculated. Monovacancies on surfaces are predicted not to trap positrons. The effect of ordered chemisorbed monolayers of oxygen is investigated: Oxidation makes the surface state unstable with respect to positronium emission.

Details

Original languageEnglish
Pages (from-to)281-284
Number of pages4
JournalPhysical Review Letters
Volume50
Issue number4
Publication statusPublished - 24 Jan 1983
MoE publication typeA1 Journal article-refereed

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ID: 6505632