Far-infrared photoconductivity spectra of quenched-in acceptors in germanium: Chemical effects on the SA1 acceptors |
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Authors: | J. Broeckx Y. Kamiura P. Clauws J. Vennik |
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Affiliation: | Laboratorium voor Kristallografie en Studie van de Vaste Stof, Rijksuniversiteit Gent, Krijgslaan 281, B9000 Gent, Belgium |
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Abstract: | Far-I.R. photoconductivity reveals the existence of at least four different kinds of SA1 acceptors in germanium quenched from T > 800 each acceptor producing two or more hydrogenic excitation line series. One acceptor is correlated with the presence of Ni, another one with strong Cu contamination. The two other acceptors, which we call ‘normal’ and ‘shifted’, occur in samples quenched without intentional doping. The experiments indicate that the SA1 acceptors in germanium are impurity complexes involving fast diffusing elements. We discuss a model according to which the SA1 acceptors would be interstitial-substitutional pairs of transition metals. In particular, we propose to assign the ‘normal’ SA1 acceptors to FeI-CuS pairs. |
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Keywords: | Permanent address: School of engineering Okayama University Okayama 700 Japan. JSPS-fellow at the Rijksuniversiteit Gent (Belgium) from Octobet 1980 to september 1981. |
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