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On the method of photoconductive detection of defects in semiconductors by vibrational mode-related Fano resonances F. Herklotz, I. Chaplygin, E. V. Lavrov

By: Herklotz, FrankContributor(s): Chaplygin, I | Lavrov, E. VMaterial type: ArticleArticleContent type: Текст Media type: электронный Subject(s): полупроводники | Фано резонанс | колебательные модыGenre/Form: статьи в журналах Online resources: Click here to access online In: Journal of applied physics Vol. 124, № 2. P. 025704-1-025704-8Abstract: The method of photoconductive detection of defect-related vibrational modes in semiconductors by Fano resonances is validated by a combined photoconductivity and infrared absorption study of the interstitial hydrogen donor in ZnO. Depth-resolved isotopic substitution experiments with varying concentrations of H and D show that the effect of vibrational mode-related absorption has to be taken into account in order to allow for an unambiguous interpretation of the experimental data. A quantitative model is presented which describes the influence of sample thickness, defect concentration, and the presence of other donors on the sign, magnitude, and shape of the Fano resonances. Implications for the photoconductive detection of defect-related vibrational modes are discussed
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The method of photoconductive detection of defect-related vibrational modes in semiconductors by Fano resonances is validated by a combined photoconductivity and infrared absorption study of the interstitial hydrogen donor in ZnO. Depth-resolved isotopic substitution experiments with varying concentrations of H and D show that the effect of vibrational mode-related absorption has to be taken into account in order to allow for an unambiguous interpretation of the experimental data. A quantitative model is presented which describes the influence of sample thickness, defect concentration, and the presence of other donors on the sign, magnitude, and shape of the Fano resonances. Implications for the photoconductive detection of defect-related vibrational modes are discussed

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