GROWTH MODE AND ELECTRONIC STRUCTURE OF SILVER ON${\rm ZnO}(10\overline{1}0)$

K. Ozawa (), T. Sato, M. Kato and K. Edamoto
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K. Ozawa: Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-0033, Japan
T. Sato: Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-0033, Japan
M. Kato: Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-0033, Japan
K. Edamoto: Department of Chemistry, Rikkyo University, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan

Surface Review and Letters (SRL), 2006, vol. 13, issue 02n03, 227-233

Abstract: The growth mode and electronic structure of the vapor-depositedAgoverlayer on the${\rm ZnO}(10\overline{1}0)$surface is investigated by angle-resolved photoemission spectroscopy utilizing synchrotron radiation. The coverage dependent measurements of the two-dimensional band structure by theAg4d states reveal that the bands with a dispersing feature are developed from the low coverage region, suggesting that theAgadatoms aggregate to form clusters with a laterally ordered structure. TheAgclusters grow in size with increasing theAgcoverage whereas the ordered atomic structure of theAgcluster is preserved. From the analysis of theAg5sp band, theAgclusters have a nonmetallic electronic structure at low coverages, and the metallic nature is developed as the size of the clusters becomes enlarged.

Keywords: Silver; zinc oxide; cluster; angle-resolved photoemission spectroscopy (ARPES); electronic structure (search for similar items in EconPapers)
Date: 2006
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DOI: 10.1142/S0218625X06008116

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