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Novel In Crystal Structures and Unusual Wetting Layer Diffusion



Controlling crystal structure on the nanoscale for In/Si(111). Bulk Indium grows bct but the In  nanoislands  grow in two different crystal structures: fcc  islands with hexagonal(or triangular) and  bct islands with rectangular shapes.

T=204K total θ= 5ML, deposited stepwise. Unusual low temperature mobility of the In wetting layer: a sequence of six 200x200μm2 images showing how the bct part of the mixed island (white) grows in height by 20 layers while the fcc islands grow by one layer. (The numbers identify each island at different times).



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