%0 Journal Article
%T Determination of piezoelectric and spontaneous polarization fields in CdxZn1-xO/ZnO quantum wells grown along the polar < 0001 > direction
%+ Groupe d'étude des semiconducteurs (GES)
%A Benharrats, F.
%A Zitouni, K.
%A Kadri, A.
%A Gil, Bernard
%< avec comité de lecture
%Z GES:10-044
%@ 0749-6036
%J Superlattices and Microstructures
%I Elsevier
%V 47
%P 592-596
%8 2010
%D 2010
%R 10.1016/j.spmi.2010.01.007
%Z Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]Journal articles
%X By iteratively solving the Schrodinger and Poisson equations, we determine theoretical values of built-in electric field induced by spontaneous and piezoelectric polarizations in wurtzite CdxZn1-xO/ZnO (x <= 0.2) quantum wells (QWs) grown along < 0001 > polar direction. By adjusting recent photoluminescence data, we find that this internal field increases with x with a linear slope A = 17.83 MV/cm. Spontaneous and piezoelectric polarization variations are also determined together with the sheet charge densities at CdxZn1-xO/ZnO heterointerface. Our results indicate similar, but much stronger polarization effects than previously reported for MgxZn1-xO/ZnO QWs. They constitute record polarization effects ever reported for wide bandgap heterostructures, including group III-nitrides. (C) 2010 Elsevier Ltd. All rights reserved.
%G English
%L hal-00546321
%U https://hal.science/hal-00546321
%~ CNRS
%~ UNIV-MONTP2
%~ GES
%~ UNIV-MONTPELLIER
%~ UM1-UM2