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arXiv 2602.00323cond-mat.mes-hall
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关于界面热传输中的兰道公式

On the Landauer formula in interfacial thermal transport

Cornell University(康奈尔大学)

Jinghang Dai, Zhiting Tian

AI总结:

本文指出兰道公式适用于多种界面情况,通过原子Green函数方法推导出精确的热流表达式。

摘要:

在本文评论中,我们澄清兰道公式不仅限于声子气体模型。它本质上更加一般化,只要传输函数定义良好,即可应用于基于粒子或波的声子描述。在谐振情况下,声子传输函数和由此产生的兰道表达式用于热流是精确的。可以严格推导出使用原子Green函数方法,该方法将声子视为波,并不需要在界面区域中使用声子色散关系。简而言之,只要使用适当的传输函数,兰道框架在理想、无序和缺陷界面中仍然有效。

英文摘要:

In this commentary, we clarify that the Landauer formula is not limited to the phonon gas model. It is fundamentally more general and applies to both particle- and wave-based descriptions of phonons, provided the transmission function is well defined. In the harmonic regime, the phonon transmission function and the resulting Landauer expression for heat current are exact. They can be rigorously derived using the atomistic Green's function method, which treats phonons as waves and does not require phonon dispersion in the interface region. In short, the Landauer framework remains valid for ideal, disordered, and defective interfaces, as long as an appropriate transmission function is used.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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