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Charge transfer and redistribution in the formation of the K/GaP(110) interface: a photoelectron spectroscopy study

D'Addato, S, Bailey, Paul, Thornton, J M C and Evans, D A (1999) Charge transfer and redistribution in the formation of the K/GaP(110) interface: a photoelectron spectroscopy study. Journal of Physics: Condensed Matter, 10 (13). pp. 2861-2871. ISSN 0953-8984

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Abstract

We present the results of a photoelectron spectroscopy study of the K/GaP(110) interface grown at T = 120 K. We have investigated the system looking at the Ga 3d and P 2p core level spectra by analysing their lineshape. This analysis shows that the transferred charge in the adatom-substrate bonding formation affects the electronic and chemical environment of both surface Ga and P atoms. The results suggest relevant differences with the intuitive picture of strong ionic localized bonding between the alkali atom and surface Ga. They are instead more consistent with a delocalized redistributed valence charge between the adsorbate and the substrate. We also conclude that the system at ML is metallic, with an increasing disorder and inhomogeneity at the highest coverage studied. The similarities and differences with the Na/GaP(110) and the other alkali metal/GaAs(110) systems are discussed.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Schools: School of Applied Sciences
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Depositing User: Sharon Beastall
Date Deposited: 06 Sep 2012 10:30
Last Modified: 06 Sep 2012 10:30
URI: http://eprints.hud.ac.uk/id/eprint/14727

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