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首页> 外文期刊>Journal of Physics. Condensed Matter >An augmented space approach to the study of random ternary alloys: I. Electronic structure with uncorrelated disorder and short ranged order
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An augmented space approach to the study of random ternary alloys: I. Electronic structure with uncorrelated disorder and short ranged order

机译:研究随机三元合金的增强空间方法:I.具有不相关无序和短程有序的电子结构

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摘要

We present here a generalized augmented space recursive technique which includes the effects of diagonal and environmental disorder explicitly: an analytic, lattice translational invariant, multiple scattering theory for the study of short range ordering in random ternary alloys. Our generalized augmented space formalism includes atomic correlations over a finite cluster including short range order (SRO). We propose the augmented space recursion (ASR), a computationally fast and accurate technique which incorporates configuration fluctuations over a large local environment. We apply the formalism to a tight-binding linear muffin-tin orbital (LMTO) study of stainless steel Fe_(80-x)Ni_xCr_(20) (x = 14 and 17). We have demonstrated the effects of short range ordering by calculating the configuration averaged density of states with and without SRO and with different kinds of cluster environment embedded in an averaged medium.
机译:我们在这里提出一种广义的增强空间递归技术,该技术明确包括对角线和环境无序的影响:一种分析,晶格平移不变,多重散射理论,用于研究随机三元合金的短程有序。我们的广义增强空间形式主义包括在包括短程顺序(SRO)在内的有限簇上的原子相关性。我们提出了增强空间递归(ASR),这是一种计算快速而准确的技术,它结合了大型局部环境中的配置波动。我们将形式主义应用于不锈钢Fe_(80-x)Ni_xCr_(20)(x = 14和17)的紧密结合的线性松饼-锡轨道(LMTO)研究。我们已经通过计算带和不带SRO以及平均介质中嵌入了不同种类簇环境的状态的配置平均密度来证明了短程排序的效果。

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