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

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.

preprint2012arXivOpen access
L. V. LutsevV. V. PavlovP. A. UsachevA. A. AstretsovA. I. StognijN. N. Novitskii
cond-mat.mes-hallcond-mat.mtrl-sci
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Open access6 authors2 topics
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L. V. LutsevV. V. PavlovP. A. UsachevA. A. AstretsovA. I. StognijN. N. Novitskii

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