Abstract
Experiments on the controlled generation of up to 20 current filaments in n-type GaAs have been performed in the electric field region, where impurity impact-ionization avalanche breakdown takes place. This strongly nonlinear system is found to be very sensitive to small deviations of the technological parameters. In particular, we present the results of time-resolved current measurements on two filaments connected in parallel, which compete for the impressed total current due to nonlocal coupling via a common load resistor. The observed switching time constants down to 100 ns make this system very interesting as a ‘‘winner takes all’’ element in synergetic computer applications.
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