Abstract
The influence of strong terahertz irradiation on quantum transport in semiconductor superlattices under parallel magnetic and dc electric fields is studied within a quantum-kinetic approach. The consideration is focused on field strengths at which Wannier-Stark and Landau quantization occur. The current density comprises two different contributions. One is due to scattering-induced delocalization of carriers. The other one is negative, and results mainly from photon absorption processes. Within a microscopic as well as a simple relaxation-time approach, the electric- and magnetic-field dependencies of combined cyclotron-Stark-phonon and Stark-photon resonances are studied.
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