Adsorption of potassium and oxygen on GaAs(110): Charge transfer and enhanced oxidation
- 15 June 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 39 (17) , 12751-12757
- https://doi.org/10.1103/physrevb.39.12751
Abstract
The behavior of charge transfer and oxidation of GaAs(110) substrates, covered with potassium and/or oxygen, and after thermal treatment, is investigated by Auger and photoelectron spectroscopy, work-function measurements, and low-energy electron diffraction. The oxidation of GaAs(110) is efficiently promoted by the presence of K adatoms. The experimental results indicate that both the charge transfer from the K atoms to the substrate and the formation of several potassium oxides may be the crucial factors for the enhancement of the substrate oxidation.Keywords
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