Interface structure and the chemical states of Pt film on polar-ZnO single crystal

T. Nagata, J. Volk, Y. Yamashita, H. Yoshikawa, M. Haemori, R. Hayakawa, M. Yoshitake, S. Ueda, K. Kobayashi, T. Chikyow

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Abstract

The interface structures and the chemical states between the Pt layer and polar-ZnO single crystal were investigated. Two-dimensional x-ray diffraction images revealed that Zn-polar ZnO had less mosaicity than the O-polar one. Angle-resolved hard x-ray photoelectron spectroscopy was used to investigate the chemical states of the interface. At the interface of the Pt/Zn-polar ZnO, zinc diffusion into the Pt layer, forming PtZn and ZnPtO bonds, was found. For the O-polar ZnO, in contrast, PtO was predominantly formed at the interface. Zinc diffusion prevented oxidization of the Pt layer and affected the mosaicity of the interface.

Original languageEnglish
Article number221904
JournalApplied Physics Letters
Volume94
Issue number22
DOIs
Publication statusPublished - 2009 Jun 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Nagata, T., Volk, J., Yamashita, Y., Yoshikawa, H., Haemori, M., Hayakawa, R., Yoshitake, M., Ueda, S., Kobayashi, K., & Chikyow, T. (2009). Interface structure and the chemical states of Pt film on polar-ZnO single crystal. Applied Physics Letters, 94(22), [221904]. https://doi.org/10.1063/1.3149701