纳米尺度热物理中的声子弱耦合问题

Phonon weak couplings in nanoscale thermophysics

纳米尺度热物理中的诸多新现象、新机制与声子弱耦合存在密切关联.本文介绍了声子弱耦合机制,以及相关的物理现象:低维体系中热导率的尺寸效应、声子双温度现象和范德瓦耳斯堆叠界面的高热阻等.同时概述了近年国内外学者对于这些新颖物理现象的前沿研究成果.对声子弱耦合目前面临的问题,例如理论模型如何加入声子波动性等,进行了简要讨论和展望.

With the development of nanoscale thermophysics,a vast number of novel phenomena have emerged,which closely relate to phonon weak couplings.The causes of phonon weak couplings mechanism and related physical discoveries are discussed in this article,including the size effect of low-dimensional systems,multitemperature model,and van der Waals cross interfaces.Corresponding frontier researches are also summarized.The current problems of phonon weak couplings,such as how to add phonon wave-like behaviors into the theoretical model,are also briefly discussed and prospected.