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Abstract
In the present work features of antimony (Sb) segregation in SiGe heterostructures grown by molecular beam epitaxy are investigated. Dependences of the segregation strength on growth temperature, composition and elastic strains are obtained. It is shown that growth conditions and parameters of the structure exert an interrelated impact on the impurity segregation: the influence of the structure parameters depends on growth temperature. Moreover, the alloy composition is found to be a much more significant factor than the elastic strains in SiGe layers. Obtained dependences of Sb segregation on growth conditions and structure parameters were used for formation of selectively doped SiGe heterostructures.
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