Quantum of thermal conductance of nanofilms due to surface-phonon polaritons
Quantum of thermal conductance of nanofilms due to surface-phonon polaritons
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DOI：
10.1103/physrevb.104.l201407
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发表时间：
2021-11-19
影响因子：
3.7
通讯作者：
Ordonez-Miranda, Jose
中科院分区：
文献类型：
--
作者：
Guo, Yangyu;Tachikawa, Saeko;Ordonez-Miranda, Jose
基于玻尔兹曼输运方程，我们证明了支持表面声子极化激元沿其表面沿着传播的足够薄的极性纳米膜的每单位宽度的热导与材料性质无关，并且由12 z（3）kB 3 T2/ch 2给出，其中kB和h是相应的玻尔兹曼和普朗克常数，而c是真空中的光速，T是温度，z（3）是Riemann zeta函数。这些能量载体的巨大传播长度确定了这种量子化不仅适用于远小于1 K的温度，如电子和声子的情况，而且适用于与室温相当的温度，这可以显着促进其在纳米级电子和光子学的热管理中的观察和实施。
Based on the Boltzmann transport equation, we demonstrate that the thermal conductance per unit width of a sufficiently thin polar nanofilm supporting the propagation of surface-phonon polaritons along its surfaces is independent of the material properties and is given by 12z(3)kB3T2/ch2, where kB and h are the respective Boltzmann and Planck constants, while c is the light speed in vacuum, T is the temperature, and z(3) is the Riemann zeta function. The huge propagation length of these energy carriers establishes that this quantization holds not only for temperatures much smaller than 1 K, as is the case of electrons and phonons, but also for those comparable to room temperature, which can significantly facilitate its observation and implementation in the thermal management of nanoscale electronics and photonics.