Impact of Electron-Phonon Interaction on Thermal Transport: A Review
Impact of Electron-Phonon Interaction on Thermal Transport: A Review
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电子-声子相互作用对热传输的影响：综述
DOI：
10.1080/15567265.2021.1902441
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发表时间：
2021-02
影响因子：
4.1
通讯作者：
Y. Quan;Shengying Yue;Bolin Liao
中科院分区：
文献类型：
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作者：
Y. Quan;Shengying Yue;Bolin Liao
摘要从微电子的热管理到更高效的热电材料，对固体热传导的微观图像的透彻理解对于广泛的应用至关重要。声子是半导体和绝缘体中主要的微观热载体，其输运性质，特别是其散射机制，一直是微尺度热传导研究的中心课题。在过去的二十年里，在计算和实验上已经取得了显着的进展，探测声子声子，声子杂质，声子边界散射通道的细节。相比之下，长期以来，人们一直认为电子-声子散射对大多数材料在环境条件下的热传输影响可以忽略不计。本文综述了第一性原理计算和实验方法的最新进展，这些方法显示了电子-声子相互作用对各种技术相关固态材料中声子输运的强烈影响的明确证据。在热平衡条件下，电子-声子相互作用可以修改总的声子散射率和重整化的声子频率，由虚部和真实的部分的声子自能，分别确定。在非平衡输运条件下，电子-声子相互作用可以通过“声子/电子拖曳”机制以及界面热输运来影响体中电子和声子的耦合输运。基于这些最新的结果，我们评估了潜在的使用电子-声子相互作用来控制固体中的热输运。我们还提供了一个展望计算和实验发展的未来方向。
ABSTRACT A thorough understanding of the microscopic picture of heat conduction in solids is critical to a broad range of applications, from thermal management of microelectronics to more efficient thermoelectric materials. The transport properties of phonons, the major microscopic heat carriers in semiconductors and insulators, particularly their scattering mechanisms, have been a central theme in microscale heat conduction research. In the past two decades, significant advancements have been made in computational and experimental efforts to probe phonon-phonon, phonon-impurity, and phonon-boundary scattering channels in detail. In contrast, electron-phonon scatterings were long thought to have negligible effects on thermal transport in most materials under ambient conditions. This article reviews the recent progress in first-principles computations and experimental methods that show clear evidence for a strong impact of electron-phonon interaction on phonon transport in a wide variety of technologically relevant solid-state materials. Under thermal equilibrium conditions, electron-phonon interactions can modify the total phonon scattering rates and renormalize the phonon frequency, as determined by the imaginary part and the real part of the phonon self-energy, respectively. Under nonequilibrium transport conditions, electron-phonon interactions can affect the coupled transport of electrons and phonons in the bulk through the “phonon/electron drag” mechanism as well as the interfacial thermal transport. Based on these recent results, we evaluate the potential use of electron-phonon interactions to control thermal transport in solids. We also provide an outlook on future directions of computational and experimental developments.