Microscopic description of thermal-phonon coherence: From coherent transport to diffuse interface scattering in superlattices

B. Latour; S. Volz; Y. Chalopin

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Microscopic description of thermal-phonon coherence: From coherent transport to diffuse interface scattering in superlattices

机译：热声子相干的微观描述：从相干传输到超晶格中的扩散界面散射

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We demonstrate the existence of a coherent transport of thermal energy in superlattices by introducing a microscopic definition of the phonon coherence length. A criterion is provided to distinguish the coherent transport regime from diffuse interface scattering and discuss how these can be specifically controlled by several physical parameters. Our approach provides a convenient framework for the interpretation of previous thermal conductivity measurements and calculations; it also paves the way for the design of a new class of thermal interface materials.

机译：通过介绍声子相干长度的微观定义，我们证明了超晶格中热能的相干传输的存在。提供了一个标准来区分相干传输方式和扩散界面散射，并讨论如何通过几个物理参数来具体控制这些方式。我们的方法为解释以前的导热系数测量和计算提供了一个方便的框架。它还为新型热界面材料的设计铺平了道路。

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来源
《Physical review》 |2014年第1期|014307.1-014307.9|共9页
作者
B. Latour; S. Volz; Y. Chalopin;
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作者单位

Laboratoire d'Energetique Moleculaire et Macroscopique, Combustion, CNRS UPR 288, Ecole Centrale Paris, F-92295 Chatenay-Malabry, France;

Laboratoire d'Energetique Moleculaire et Macroscopique, Combustion, CNRS UPR 288, Ecole Centrale Paris, F-92295 Chatenay-Malabry, France;

Laboratoire d'Energetique Moleculaire et Macroscopique, Combustion, CNRS UPR 288, Ecole Centrale Paris, F-92295 Chatenay-Malabry, France;

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正文语种 eng
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thermal properties of crystalline solids; surface and interface dynamics and vibrations;

机译：结晶固体的热性能;表面和界面的动力学和振动;

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Microscopic description of thermal-phonon coherence: From coherent transport to diffuse interface scattering in superlattices

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