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Although the Sn content in GeSn can reach 10% using chemical vapor deposition, the reduction of Sn content by in-situ boron doping and solid phase doping by chemical vapor deposition are observed. The Sn loss increases with the increasing boron concentration in GeSn:B alloys, while there is no Sn reduction at the similar phosphorus doping level in GeSn:P. Based on the first principle calculations,...
The annealing effects on the composition distribution of Ge islands on Si (001) were investigated by atomic force microscopy combined with selective wet chemical etching. Experimental results demonstrate that there is a strong composition redistribution occurring during island growth and postgrowth annealing. We observe that, once Ge superdomes appear, the asymmetric composition profile of the Ge...
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