论文标题
锌 - 塞林尼（ZnSE）和牙脲锌（ZNTE）的长度依赖性导热系
Length Dependence thermal conductivity of Zinc-Selenide (ZnSe) and Zinc Telluride (ZnTe)- A combined first principles and Frequency Domain Thermoreflectance (FDTR) study
论文作者
论文摘要
在这项研究中，我们使用基于密度功能官能理论的第一原理计算，报告了10 nm至10000 nm之间的长度尺度的锌 - 搅拌锌 - 塞林尼（ZnSE）和锌醇锌（Znte）的长度依赖性。随着长度尺度从10 nm降低到10 nm，ZNSE的k值被计算为从11.3 w/mk显着降低到1.75 w/mk。还观察到Znte的K值从10 W/MK降低到1.2 W/MK，长度相同。我们还使用频域热心（FDTR）技术测量了大量ZnSe和Znte的K k，并观察到FDTR测量值与批量ZNSE和ZNTE的第一原理计算之间的良好一致性。了解纳米长度尺度下的导热率降低的理解为融合了用于热电应用的纳米结构ZnSE和ZNTE的途径。
In this study, we report the length dependence of thermal conductivity (k) of zinc-blende Zinc-Selenide (ZnSe) and Zinc Telluride (ZnTe) for length scales between 10 nm and 10000 nm using first-principles computations based on density-functional theory. k value of ZnSe is computed to decrease significantly from 11.3 W/mK to 1.75 W/mK as the length scale is diminished from 10 nm to 10 nm. k value of ZnTe is also observed to decrease from 10 W/mK to 1.2 W/mK for the same decrease in length. We also measure the k of bulk ZnSe and ZnTe using Frequency Domain Thermoreflectance (FDTR) technique and observed a good agreement between FDTR measurements and first principles calculations for the bulk ZnSe and ZnTe. Understanding of thermal conductivity reduction at nanometer length scales provides an avenue to incorporate nanostructured ZnSe and ZnTe for thermoelectric applications.
