| Abstract
| - The adsorption process and valence band structure of Ag on ZnO(101̄0) have been investigated by angle-resolved photoelectron spectroscopy utilizing synchrotron radiation. The coverage-dependent measurementsof the Ag 4d band structure reveal that the Ag bands with a dispersing feature are formed even at low coveragesand that the basic structure of the bands is essentially the same throughout the submonolayer region. Theseresults indicate that the Ag atoms aggregate to form islands with an atomically ordered structure from thelow coverages. Upon annealing the Ag-covered surface at 900 K, the Ag 4d band undergoes only a minorchange, suggesting that the ordered structure within the Ag islands is persistent against mild annealing. Fromthe dispersive feature of the Ag 4d states, we propose that the atomic structure has locally rectangular symmetrywith a good lattice matching with the ZnO(101̄0) surface.
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