Impeded thermal transport in aperiodic BN/C nanotube superlattices due to phonon Anderson localization  

作　　者：孙路易 翟方园 曹增强 黄晓宇 郭春生 王红艳 倪宇翔 Luyi Sun;Fangyuan Zhai;Zengqiang Cao;Xiaoyu Huang;Chunsheng Guo;Hongyan Wang;Yuxiang Ni(School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Chinese Physics B》2023年第5期14-19,共6页中国物理B（英文版）

摘　　要：Anderson localization of phonons is a kind of phonon wave effect,which has been proved to occur in many structures with disorders.In this work,we introduced aperiodicity to boron nitride/carbon nanotube superlattices(BN/C NT SLs),and used molecular dynamics to calculate the thermal conductivity and the phonon transmission spectrum of the models.The existence of phonon Anderson localization was proved in this quasi one-dimensional structure by analyzing the phonon transmission spectra.Moreover,we introduced interfacial mixing to the aperiodic BN/C NT SLs and found that the coexistence of the two disorder entities(aperiodicity and interfacial mixing)can further decrease the thermal conductivity.In addition,we also showed that anharmonicity can destroy phonon localization at high temperatures.This work provides a reference for designing thermoelectric materials with low thermal conductivity by taking advantage of phonon localization.

关 键 词：Anderson localization PHONONS nanotube superlattices thermal conductivity 

分 类 号：TB34[一般工业技术—材料科学与工程]