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Abstract
Antimony overlayers deposited on GaAs(110) surfaces prepared by cleavage in ultrahigh vacuum have been investigated by ellipsometric spectroscopy. Antimony films in the submonolayer coverage range exhibit spectral features arising from interband transitions. Films of up to 10ML (where ML denotes monolayer) thickness are of inhomogeneous consistency as demonstrated by comparison with calculations based on the Maxwell Garnett model. Slight annealing causes a smoothing of the films. Thicker films exhibit an optical behaviour like that of polycrystalline antimony.
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