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Domain instability in p-Ge⟨Au⟩ in a nonlinear regime

A theory describing the evolution of domain instability in a two-parameter space (voltage and emission coefficient) was verified experimentally for p-Ge doped with Sb and compensated with Au (residual impurity concentration NA-ND = (10-14-10-15) cm-3 at 77 K) in strong electric fields under high levels of optical excitation. According to the theory, one-, two- and multi- subdomain states and order-disorder-order transitions via intermittency are observed in the system with increasing voltage. Three operation modes of the system are found, depending on the region of the parametric space: ohmic, quenched (pulsing) or transit-time.