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- W1927831132 abstract "Using surface X-ray diffraction we have investigated the structure of the BiCu surface alloy formed after Bi deposition on Cu(001) at room temperature. At low Bi coverage below about 0.35 ML (1 ML = 1.53 × 1015 atoms cm−2), the intensity distribution along the integer order crystal truncation rods indicates surface alloying where Bi atoms substitute Cu surface atoms. The Bi atoms adsorb 0.61 (10) Å above the surface Cu layer. At a coverage above about 0.35 ML where the formation of a well-ordered c(2 × 2) superstructure starts to set in, we observe surface dealloying indicated by a rapid decrease of the fractional Cu occupancy of the surface layer with increasing Bi coverage. The Bi atoms are located in hollow sites at an adsorption height of 2.27 (10) Å corresponding to a hard sphere radius of 1.63 (8) Å, somewhat below the metallic radius of 1.82 Å." @default.
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- W1927831132 date "1997-06-01" @default.
- W1927831132 modified "2023-10-17" @default.
- W1927831132 title "Surface alloying and dealloying in at low coverage" @default.
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- W1927831132 doi "https://doi.org/10.1016/s0039-6028(97)00052-6" @default.
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