Abstract
Chaotic self-generated current oscillations are investigated in semi-insulating GaAs:Cr at electric fields ≳ 3 kV/cm. The evolution of the phase space dimension m o, related to the fractal dimension of the strange attractor d: m o = int( d)+1, is determined by means of a special electronic instrument. A physical model is proposed which includes spatial nonuniformity of the hot electron plasma.
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