Abstract
Abstract The deposition of 1/3 Pb monolayer at room temperature onto Ag(111) leads to a p ( 3 × 3 ) R 30 ∘ superstructure. We present here a detailed structural study of this surface structure by Synchrotron Radiation Surface X-Ray Diffraction (SXRD) and Scanning Tunnelling Microscopy (STM). Unexpectedly the Pb atoms are embedded into the silver top surface layer forming an original, ordered, Ag2Pb surface alloy despite the strong tendency of the system to phase separate.
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