Phase diagram of static- and dynamic-domain formation in weakly coupled GaAs/AlAs superlattices

We report on the phase diagram of static- and dynamic-domain formation in weakly coupled GaAs/AlAs superlattices (SL's). We have performed a detailed investigation of self-oscillations of the photocurrent using the control parameters of applied bias and carrier density inside the SL's. The resulting phase diagram clearly demonstrates that the boundary between oscillating- and Static-domain formation, defined as a critical carrier density, varies with bias voltage.