Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Field enhanced blockade of the confined energy levels in nanometer scale pillar arrays

Feldverstärkte Blockade der Energieniveaus von Nanometer großen Säulenfeldern
: Alphenaar, B.W.; Durrani, Z.A.K.; Wagner, M.; Köhler, K.


Surface Science 361/362 (1996), pp.185-188
ISSN: 0039-6028
Journal Article
Fraunhofer IAF ()
heterostructure; Heterostruktur; III-V Halbleiter; III-V semiconductors; quantum wells

We report observations of dramatic hysteretic switching behavior in nanometer scale pillar arrays. Using a new technique, we fabricate arrays of closely packed pillars 20-50 nm in diameter from a GaAs/AlAs resonant tunneling diode hetcrostructure. The array resistance switches between two stable states with a current peak to valley ratio of 500:1. Scanning tunneling microscope characterization of individual pillars suggests that the pillars trap charge to block the flow of current through the quantum confined states.