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- W2092636698 abstract "Abstract Gallium arsenide epitaxial layers have been activated to negative electron affinity by a two-stage process. This consisted of a heat clean in vacuum and activation with caesium and oxygen, followed by a second heating, to partially desorb the caesium, and re-activation with caesium and oxygen. AES measurements during the first activation indicated that the oxygen/caesium ratio increased as the photoemission increased to a maximum. This ratio was always less than the nearly constant ratio during the second activation which gave greater photoemission. After both the first and second activations desorption studies showed that, whereas the caesium Auger peak height decreased monotonically over a wide range of temperature, the oxygen peak height passed through a maximum as the temperature was increased, before decreasing rapidly to zero as the caesium desorption was completed. This temperature of desorption was slightly higher after the second activation. LEED showed that the caesium-oxygen layer was amorphous." @default.
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- W2092636698 date "1975-02-01" @default.
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- W2092636698 title "AES and LEED study of the activation of GaAsCsO negative electron affinity surfaces" @default.
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- W2092636698 doi "https://doi.org/10.1016/0039-6028(75)90197-1" @default.
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