Negative photoconductance in SiO2(Co)/GaAs heterostructure in the avalanche regime

L. V. Lutsev , V. V. Pavlov , P. A. Usachev , A. A. Astretsov , A. I. Stognij , N. N. Novitskii

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classification ❄️ cond-mat.mes-hall cond-mat.mtrl-sci

keywords gaasavalanchesio2bandgapenergynegativephotoconductanceregime

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In the avalanche regime we observed the negative photoconductance of heterostructures of silicon dioxide films containing cobalt nanoparticles grown on gallium arsenide, SiO2(Co)/GaAs. Light irradiation with the photon energy less than the bandgap energy of the GaAs creates holes trapped on defects within the GaAs bandgap, suppresses the avalanche feedback and causes a reduction of the current flowing in the SiO2(Co)/GaAs.

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Negative photoconductance in SiO2(Co)/GaAs heterostructure in the avalanche regime

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