1209.3303 (L. V. Lutsev et al.)

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

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

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.

View original: http://arxiv.org/abs/1209.3303