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Field-induced delocalization and zener breakdown in semiconductor superlattices

Feldinduzierte Delokalisierung und Zenerdurchbruch in Halbleitergittern


Physica. B 272 (1999), 1-4, pp.180-182
ISSN: 0921-4526
Journal Article
Fraunhofer IAF ()
III-V semiconductor; III-V Halbleiter; superlattice; Übergitter; optical measurement; optische Messung

We investigate the electronic structure in strongly coupled superlattices over a wide field range. It is shown that the Wannier-Stark localization is followed by a field-induced delocalization which is due to a strong Zener coupling to continuum states. The associated Zener breakdown is quantitatively shown in a detailed analysis of the absorption. A comprehensive theoretical model excellently describes the experimental results. Zener tunneling times are directly addressed with the help of time-resolved experiments.