Surface morphology of epitaxial CaF2 films on GaAs(100)

Hoffman, R. A.; Sinharoy, S.; Farrow, R. F. C.
November 1985
Applied Physics Letters;11/15/1985, Vol. 47 Issue 10, p1068
Academic Journal
The surface morphology of CaF2 films grown epitaxially on (100) GaAs substrates in an ultrahigh vacuum system is examined using reflection high-energy electron diffraction, scanning electron microscopy, and replica transmission electron microscopy. Proper substrate surface preparation and film deposition techniques are critical for obtaining epitaxial films which are crack free and smooth. We have demonstrated that group II-A fluoride films which have a barely perceptible surface texture can be grown onto (100) oriented substrates.


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