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Delocalization induced by low-frequency driving in disordered superlattices

Research paper by Dario F. Martinez, Rafael A. Molina

Indexed on: 08 Nov '05Published on: 08 Nov '05Published in: Physics - Disordered Systems and Neural Networks



Abstract

We study the localization properties of disordered semiconductor superlattices driven by ac-fields. The localization length of the electrons in the superlattice increases when the frequency of the driving field is smaller than the miniband width. We show that there is an optimal value of the amplitude of the driving field for which the localization length of the system is maximal. This maximum localization length increases with the inverse of the driving frequency.