Based on a pseudopotential approach under a modified virtual crystal approximation that includes the alloy disorder effect, the elastic constants and some of their related mechanical properties of Al_xIn_1-xP ternary semiconducting alloys have been computed. Features such as elastic constants, bulk modulus, shear modulus and Young’s modulus are determined and their composition dependence is examined and discussed. Besides, Pugh's ratio and Cauchy pressure have been analyzed indicating that Al_xIn_1-xP alloy system behaves in a ductile manner for all compositions x (0≤x≤1). Our findings show generally good accord with experiment. The obtained results are expected to be useful for understanding the elastic properties of Al_xIn_1-xP and for applications in optoelectronics.

中文翻译：

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AlxIn1-xP的弹性常数及相关的力学性能

基于包含合金无序效应的修正虚拟晶体近似下的拟势方法，计算了Al _x In _1-x P三元半导体合金的弹性常数及其一些相关的机械性能。确定诸如弹性常数，体积模量，剪切模量和杨氏模量的特征，并检查和讨论它们的组成依赖性。此外，分析了Pugh比和柯西压力，表明Al _x In _1-x P合金体系对于所有成分x（0≤x≤1）都具有延性。我们的发现总体上与实验吻合。预期所得结果将有助于理解Al _x的弹性。在_1-x P中，用于光电。