Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 25, Pages 4483-4485Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1585126
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The growth of Si on thin (similar to3 nm thick) CaF2/Si(111) films in the temperature range of 500-700 degreesC was investigated using ultrahigh-vacuum noncontact atomic force microscopy. At 500 degreesC, the morphology is dominated by small cluster-like shaped Si islands due to weak binding between Si and CaF2; with increasing growth temperatures these islands coexist with an increasing amount of triangular-shaped, flat Si islands. The formation of flattened triangular islands is attributed to an increased binding of Si to the CaF2 film at higher temperatures. The binding changes as a result of an interface reaction leading to the removal of fluorine atoms and the formation of Ca-Si bonds. (C) 2003 American Institute of Physics.
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