Abstract
A study on preparation of Cd0.96Zn0.04Te(211)B substrates for growth of Hg1−xCdxTe epitaxial layers by molecular beam epitaxy (MBE) was investigated. The objective was to investigate the impact of starting substrate surface quality on surface defects such as voids and hillocks commonly observed on MBE Hg1−xCdxTe layers. The results of this study indicate that, when the Cd0.96Zn0.04Te(211)B substrates are properly prepared, surface defects on the resulting MBE Hg1−xCdxTe films are reduced to minimum (size, ∼0.1 m and density ∼500/cm2) so that these MBE Hg1−xCdx Te films have surface quality as good as that of liquid phase epitaxial (LPE) Hg1−xCdxTe films currently in production in this laboratory.
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