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Strain relaxation in step and linearly-graded InGaAs buffer layers on (001) GaAs

机译:在(001)GaAs的步骤中和线性分级的IngaAs缓冲层的应变松弛

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The strain distribution through three different graded InGaAs buffer structures (step, inverse-step and linearly-graded) deposited by Molecular Beam Epitaxy on (001) GaAs substrates and capped by InGaAs single layers is studied using Transmission Electron Microscopy and Photoluminescence. The cap layer relaxation state and the efficiency of these buffers when filtering threading dislocations are discussed.
机译:通过分子束外延上沉积的三种不同分级的InGaAs缓冲器结构(步骤,倒数步骤和线性分级)的应变分布在(001)GaAs底物上沉积并通过透射电子显微镜和光致发光地通过InGaAs单层覆盖。讨论了盖层弛豫状态和这些缓冲液在过滤穿线脱位时的效率。

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