Archivio Istituzionale della RicercaWe 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.
Field-induced delocalization and Zener breakdown in semiconductor superlattices / Rosam, B.; Meinhold, D.; Loser, F.; Lyssenko, V. G.; Glutsch, S.; Bechstedt, F.; Rossi, Fausto; Kohler, K.; Leo, K.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 86:7(2001), pp. 1307-1310. [10.1103/PhysRevLett.86.1307]
Field-induced delocalization and Zener breakdown in semiconductor superlattices
ROSSI, FAUSTO;
2001
Abstract
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.
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https://hdl.handle.net/11583/1405203
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