Abstract
AbstractIn the Ge/LTGe/GeSi/Si(001) heterostructures, the GeSi buffer layer remains pseudomorphic in a certain range of the heterostructure parameters and growth regimes, while the Ge film is completely relaxed owing to the edge dislocation network at the Ge/GeSi interface. It has been experimentally shown that, along with edge dislocations, dislocations with the Burgers vectors of the a _0〈100〉-type form. Their formation is caused by the reaction of 60° dislocations with a unidirectional screw component. In this case, if during the buffer layer relaxation the edge dislocations split with the formation of an edge-type dislocation complex, in which the 60° dislocations remained bound, the dislocations with the Burgers vectors a _0〈001〉 split into two independent 60° dislocations.
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