M. Patra, G. Schwarz, F. Prengel and E. Schöll
Institut für Theoretische Physik, Technische Universität
Berlin,
D-10623 Berlin - eMail: patra@physik.tu-berlin.de
We theoretically investigate vertical high-field transport in semiconductor superlattices, which exhibit self-generated current oscillations and the formation of stable stationary electric field domains depending on the available carrier density. The corresponding bifurcations scenarios and phase diagrams are determined. We demonstrate how this behaviour is affected by growth-related imperfections like fluctuations of the doping density.