Solid-solution alloy scattering of phonons is a demonstrated mechanism to reduce the lattice thermal conductivity. The analytical model of Klemens works well both as a predictive tool for engineering materials, particularly in the field of thermoelectrics, and as a benchmark for the rapidly advancing theory of thermal transport in complex and defective materials. This comment/review outlines the simple algorithm used to predict the thermal conductivity reduction due to alloy scattering, as to avoid common misinterpretations, which have led to a large overestimation of mass fluctuation scattering. The Klemens model for vacancy scattering predicts a nearly 10× larger scattering parameter than is typically assumed, yet this large effect has often gone undetected due to a cancellation of errors. The Klemens description is generalizable for use in ab initio calculations on complex materials with imperfections. The closeness of the analytic approximation to both experiment and theory reveals the simple phenomena that emerges from the complexity and unexplored opportunities to reduce thermal conductivity.

中文翻译：

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声子的合金散射

声子的固溶合金散射是降低晶格热导率的有效机制。Klemens的分析模型既可以用作工程材料的预测工具，尤其是在热电领域，也可以作为复杂材料和有缺陷材料中快速发展的热传输理论的基准。这篇评论/评论概述了用于预测由于合金散射引起的导热系数降低的简单算法，以避免常见的误解，这种误解导致对质量波动散射的过高估计。空位散射的Klemens模型预测的散射参数比通常假定的要大将近10倍，但是由于消除了误差，这种大效果经常未被发现。Klemens描述可推广用于从头开始计算具有缺陷的复杂材料。解析近似与实验和理论的接近性揭示了简单现象，这种现象是由降低导热系数的复杂性和未开发的机会而产生的。