title: Field-induced delocalization and Zener breakdown in semiconductor superlattices.
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.
authors.affiliation: Institut fur Angewandte Photophysik, Technische Universitat Dresden, 01062 Dresden, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Rosam
authors.forename: D
authors.initials: D
authors.lastname: Meinhold
authors.forename: F
authors.initials: F
authors.lastname: Löser
authors.forename: V G
authors.initials: VG
authors.lastname: Lyssenko
authors.forename: S
authors.initials: S
authors.lastname: Glutsch
authors.forename: F
authors.initials: F
authors.lastname: Bechstedt
authors.forename: F
authors.initials: F
authors.lastname: Rossi
authors.forename: K
authors.initials: K
authors.lastname: Köhler
authors.forename: K
authors.initials: K
authors.lastname: Leo