Structural investigation of ZnO O-polar (000(1)over-bar) surfaces and Schottky interfaces

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We report on the atomic structures of bare and metal-coated ZnO O-polar (000 (1) over bar) surfaces as determined by model fitting of surface X-ray diffraction data. O-polar surfaces measured under typical device fabrication conditions are significantly rougher than Zn-polar (0001) surfaces, exhibiting Gaussian-shaped roughness profiles with a width of about 1.5 unit cells, regardless of the existence of a metal over-layer. All samples show a decreased layer distance between the topmost oxygen and zinc layers, consistent with theoretical predictions. Clear differences are observed in the occupations of the topmost oxygen layer in oxidized-metal-coated samples. (C) 2013 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2013-04
Language
English
Article Type
Article
Keywords

OXIDE SURFACES; 10(1)OVER-BAR0; STM

Citation

SURFACE SCIENCE, v.610, pp.22 - 26

ISSN
0039-6028
DOI
10.1016/j.susc.2012.12.018
URI
http://hdl.handle.net/10203/246196
Appears in Collection
PH-Journal Papers(저널논문)
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