Relaxation of low-temperature negative photoconductivity in p-GaAs/Al0.5Ga0.5As under normal and uniaxially stressed conditions

The study of transient relaxation processes of photoconductivity in p GaAs/Al 0.5 Ga 0.5 As:Be in the dark after illumination has been undertaken for verification of the previously proposed model for explanation of low-temperature thermoactivated photoconductivity in these heterostructures. Relaxa-t...

Full description

Saved in:
Bibliographic Details
Published in:High pressure research 2006-12, Vol.26 (4), p.519-522
Main Authors: Ilievsky, A. A., Minina, N. Ya, Bogdanov, E. V., Kolokolov, K. I.
Format: Article
Language:English
Subjects:
1−x
GaAs/Al
Negative photoconductivity
Uniaxial compression
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The study of transient relaxation processes of photoconductivity in p GaAs/Al 0.5 Ga 0.5 As:Be in the dark after illumination has been undertaken for verification of the previously proposed model for explanation of low-temperature thermoactivated photoconductivity in these heterostructures. Relaxa-tions of 2D hole concentration at a different magnitude of uniaxial stress show strong temperature dependence and may be well described in terms of kinetic phenomena developed for materials with deep centers, which give an opportunity for thermoactivation barrier E B evolution. The magnitude E B =2±0.3 meV, which was calculated from experimental data, is well comparable with E B =3±0.5 meV obtained previously from dynamic equilibrium measurements under illumination and does not reveal dependence on uniaxial stress.
ISSN:0895-7959
1477-2299
DOI:10.1080/08957950601105119