Field-induced delocalization and Zener breakdown in semiconductor superlattices

We investigate the energy spectrum and the electron dynamics of a band in a semiconductor superlattice as a function of the electric field. Linear optical spectroscopy shows that, for high fields, the well-known localization of the Bloch states is followed by a field-induced delocalization, associat...

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Bibliographic Details
Published in:Physical review letters 2001-02, Vol.86 (7), p.1307-1310
Main Authors: Rosam, B, Meinhold, D, Löser, F, Lyssenko, V G, Glutsch, S, Bechstedt, F, Rossi, F, Köhler, K, Leo, K
Format: Article
Language:English
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Summary:We investigate the energy spectrum and the electron dynamics of a band in a semiconductor superlattice as a function of the electric field. Linear optical spectroscopy shows that, for high fields, the well-known localization of the Bloch states is followed by a field-induced delocalization, associated with Zener breakdown. Using time-resolved measurements, we observe Bloch oscillations in a regime where they are damped by Zener breakdown.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.86.1307