Miniband Formation at Finite Electric Fields in a Graded-Gap Superlattice

A graded-gap superlattice of Al sub x Ga sub 1 sub - sub x As-Alsub y Ga sub 1 sub -sub y As is studied with differential photocurrent spectroscopy at 77 K. With increasing electric field, the lowest conduction subband exhibits a transition from localized to extended miniband states and back to loca...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Europhysics letters 1993-08, Vol.23 (4), p.283-288
Hauptverfasser: Agulló-Rueda, F, D'Intino, A, Schmidt, K. H, Döhler, G. H, Grahn, H. T, Ploog, K
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A graded-gap superlattice of Al sub x Ga sub 1 sub - sub x As-Alsub y Ga sub 1 sub -sub y As is studied with differential photocurrent spectroscopy at 77 K. With increasing electric field, the lowest conduction subband exhibits a transition from localized to extended miniband states and back to localized states. Calculations of miniband width using different methods support the interpretation of miniband formation at finite electric fields.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/23/4/008