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Semiconductor superlattices are ideal systems to test theories involving band structure properties. We investigate here the ``Zener'' breakdown in the miniband structure of GaAs/GaAlAs superlattices, which, in contrast to interband tunneling in bulk semiconductors, exhibits resonant tunneling properties. The results of dc and microwave transport experiments are explained by a quantum sequential ladder descent model, incorporated in an effective medium description of the transport processes.
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Sibille et al. (1998) studied this question.
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