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 Theta = 1 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.

Charge transfer and redistribution in the formation of the K/GaP(110) interface: a photoelectron spectroscopy study / D'Addato, Sergio; P., Bailey; J. M. C., Thornton; D. A., Evans. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - STAMPA. - 10:(1998), pp. 2861-2871. [10.1088/0953-8984/10/13/005]

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

D'ADDATO, Sergio;
1998

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 Theta = 1 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.
1998
10
2861
2871
Charge transfer and redistribution in the formation of the K/GaP(110) interface: a photoelectron spectroscopy study / D'Addato, Sergio; P., Bailey; J. M. C., Thornton; D. A., Evans. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - STAMPA. - 10:(1998), pp. 2861-2871. [10.1088/0953-8984/10/13/005]
D'Addato, Sergio; P., Bailey; J. M. C., Thornton; D. A., Evans
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/668672
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