RT Journal Article
T1 Extended states and dynamical localization in semiconductor superlattices
A1 Domínguez-Adame Acosta, Francisco
A1 Sánchez, A.
A1 Díez Alcántara, Eduardo
AB We study the quantum dynamics of electronic wave packets in quantum-well based semiconductor superlattices subject to an applied electric field. Using a high-accuracy numerical method, we analyze the dynamical behavior of electronic wave packets in periodic, random and random dimer superlattices. The spatial extent of electronic states is characterized by means of the time-dependent inverse participation ratio. We show that the delocalized states recently found in random dimer superlattices become spatially localized under the action of the applied field (dynamical localization) but wavepackets are much less localized than in purely random superlattices at moderate field. We conclude that the resonant tunneling effects causing delocalization in dimer superlattices play an important role even in the presence of moderate electric field.
PB American Institute of Physics
SN 0021-8979
YR 1997
FD 1997-01-15
LK https://hdl.handle.net/20.500.14352/59369
UL https://hdl.handle.net/20.500.14352/59369
LA eng
NO © 1997 American Institute of Physics.This work has been supported by CICYT (Spain) under project MAT95-0325.
NO CICYT (Spain
DS Docta Complutense
RD 8 abr 2025