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.
|Titolo:||Field-induced delocalization and Zener breakdown in semiconductor superlattices|
|Data di pubblicazione:||2001|
|Digital Object Identifier (DOI):||10.1103/PhysRevLett.86.1307|
|Appare nelle tipologie:||1.1 Articolo in rivista|