Microindentation at room temperature has been studied, by transmission electron microscopy, for GaAlAs and GaInAs with a range of compositions. Both p-type and n-type alloys have been investigated with particular reference to the formation of microtwins. A change of doping from n-type to p-type in GaAlAs results in microtwin formation along perpendicular 〈110〉 rosette arms. This is also observed in n-type GaInAs alloys.
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Haswell et al. (1991) studied this question.
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