Mapping phonon hydrodynamic strength in micrometer-scale graphite structures
Mapping phonon hydrodynamic strength in micrometer-scale graphite structures
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DOI：
10.35848/1882-0786/ac8f82
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发表时间：
2022-10-01
影响因子：
2.3
通讯作者：
Nomura, Masahiro
中科院分区：
文献类型：
--
作者：
Huang, Xin;Guo, Yangyu;Nomura, Masahiro
由于独特的集体输运行为和在热管理中的潜在应用，声子在高温下的流体动力学在石墨等宿主材料中越来越受到关注。我们绘制了有限长度和宽度的C-12纯化石墨微结构在广泛尺寸和温度范围内的稳态声子流体动力流动强度。我们的理论模型表明，随着宽度从几微米到10 μ m的增加，流体动力声子传导得到了很大的加强，并向较低的温度范围转移。本工作为有限尺寸石墨材料中的声子流体力学提供了见解，并指导了实验观察。
With the peculiar collective transport behaviors and potential applications in thermal management, phonon hydrodynamics at elevated temperatures draws increasing attention in host materials, such as graphite. We map the strength of steady-state phonon hydrodynamic flow in C-12 purified graphite micro-structures with finite length and width in a broad range of sizes and temperatures. Our theoretical modeling demonstrates that hydrodynamic phonon conduction is largely strengthened and shifts to lower temperature ranges with increasing width from a few micro-meters to 10 mu m. The present work provides an insight into phonon hydrodynamics in finite-sized graphitic materials and guides its experimental observation.