散射
声子
声子散射
凝聚态物理
非弹性散射
表面声子
物理
极化子
热导率
材料科学
光学
量子力学
作者
Dudong Feng,Xiaolong Yang,Zherui Han,Xiulin Ruan
出处
期刊:Physical review
[American Physical Society]
日期:2024-02-29
卷期号:109 (8)
被引量:1
标识
DOI:10.1103/physrevb.109.l081409
摘要
Inelastic scattering processes typically introduce friction among carriers and reduce the transport properties of photons, phonons, and electrons. However, we predict that in contrast to the role in reducing thermal conductivity, four-phonon scattering dominates the near-field radiative heat transfer (NFRHT) in both boron arsenide (BAs) and boron antimonide. Including four-phonon scattering results in a nearly 400-fold increase in the total heat flux between two BAs thin films compared to three-phonon scattering alone. This nonintuitive enhancement arises from the large number of NFRHT channels activated by four-phonon scattering, outcompeting the effect of decreased coupling strength of surface phonon polaritons at the resonance frequency. Additionally, we point out that four-phonon scattering decreases NFRHT in certain other systems.
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