Journal
PHYSICAL REVIEW B
Volume 74, Issue 20, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.74.201304
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Contrary to earlier reports, high-resolution scanning tunneling microscopy (STM) images of the Ag/Si(111)-root 3 x root 3 surface show an inequivalent honeycomb structure at room temperature. The appearance of two different sizes in Ag trimers fits well with a recently reported inequivalent-triangle model instead of the widely accepted honeycomb-chain-trimer model. In addition, we found that Si trimers, which were missing in earlier STM observations, form a bright hexagonal pattern surrounded by a honeycomb chain from Ag trimers.
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