Chaotic front dynamics in semiconductor superlattices

Abstract

We analyze the dynamical evolution of the current and the charge density in a superlattice for fixed external dc voltage in the regime of self-sustained current oscillations, using a microscopic sequential tunneling model. Fronts of accumulation and depletion layers which are generated at the emitter may collide and annihilate, thereby leading to a variety of different scenarios. We find complex chaotic regimes at high voltages and low contact conductivities.

4 pages, 4 figures

References in corpus (1)

• Semiconductor Superlattices: A model system for nonlinear transport

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