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VOLUME 49 (1989) | ISSUE 2 | PAGE 113
Interband photoconductivity of a mesoscopic GaAs sample
A fundamentally new feature has been observed in the behavior of the interband photoconductivity of a mesoscopic GaAs sample: This conductivity oscillates aperiodically in time. The averge oscillation frequency is proportional to the light intensity. Analysis of the photoconductivity shows that at low intensities it is caused by a charge exchange involving a number of impurities on the order of unity.