TITLE

Polarity determination of ZnO thin films by electron holography

AUTHOR(S)
Xu, Q. Y.; Wang, Y.; Wang, Y. G.; Du, X. L.; Xue, Q. K.; Zhang, Z.
PUB. DATE
March 2004
SOURCE
Applied Physics Letters;3/22/2004, Vol. 84 Issue 12, p2067
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The polarity of the ZnO film grown on sapphire using an ultrathin Ga wetting layer has been investigated by electron holography. Spontaneous polarization of the ZnO film leads to localized charges in the surface, which change the potential distribution in the vacuum side of the film. The potential distribution depends on the nature of the bounded charges and change as a function of the distance from the film surface. By studying the dependence of the potential change on the distance from the film surface, the ZnO film with very thin Ga wetting layer is determined to have the [0001] polarity. © 2004 American Institute of Physics.
ACCESSION #
12530510

 

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