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IBM J. Res. Dev
Changes in nucleation and phase formation sequence with temperature may strongly affect the morphology of the final phase. The Si(111)-(3 × 3) Ag structure develops directly from the clean (7×7) structure at lower temperatures (500-700 K). Preferred nucleation at step edges and (7×7) domain boundaries reduces the effective dimensionality of the substrate and explains anomalies in domain size scaling observed by Zuo and Wendelken. An intermediate three-domain (3×1) structure precedes the 3 structure at higher temperatures, leading to a complete change in 3 nucleation and growth, as well as final domain size distribution and total Ag coverage. © 1992 The American Physical Society.
J. Sun, J.B. Hannon, et al.
IBM J. Res. Dev
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