Analytical interpretation of nondiffusive phonon transport in thermoreflectance thermal conductivity measurements
Analytical interpretation of nondiffusive phonon transport in thermoreflectance thermal conductivity measurements
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热反射热导率测量中非扩散声子输运的分析解释
DOI：
10.1103/physrevb.90.064302
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发表时间：
2014
影响因子：
3.7
通讯作者：
J. Malen
中科院分区：
文献类型：
--
作者：
K. Regner;A. McGaughey;J. Malen
的解决方案域。第二个电阻占运输的能量载体通过解决方案域，并受实验定义的长度尺度。的BTE结果与传统的热扩散理论的比较，使映射的平均自由路径特定的贡献的测量的热导率的实验长度尺度的基础上。通常，测量的热导率将受到两个长度尺度中较小的一个和系统的表面性质的影响。其结果是用来比较非扩散的硅的热导率测量与基于第一性原理的计算其热导率累积功能。
of the solution domain. The second resistance accounts for transport of energy carriers through the solution domain and is affected by the experimentally defined length scales. Comparison of the BTE result with that from conventional heat diffusion theory enables a mapping of mean-free-path-specific contributions to the measured thermal conductivity based on the experimental length scales. In general, the measured thermal conductivity will be influenced by the smaller of the two length scales and the surface properties of the system. The result is used to compare nondiffusive thermal conductivity measurements of silicon with first-principles-based calculations of its thermal conductivity accumulation function.