中国物理B ›› 2023, Vol. 32 ›› Issue (5): 56301-056301.doi: 10.1088/1674-1056/acb9e7

所属专题: SPECIAL TOPIC — Smart design of materials and design of smart materials

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

Luyi Sun(孙路易), Fangyuan Zhai(翟方园), Zengqiang Cao(曹增强), Xiaoyu Huang(黄晓宇), Chunsheng Guo(郭春生), Hongyan Wang(王红艳), and Yuxiang Ni(倪宇翔)   

  1. School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
  • 收稿日期:2022-12-31 修回日期:2023-02-05 接受日期:2023-02-08 出版日期:2023-04-21 发布日期:2023-04-21
  • 通讯作者: Yuxiang Ni E-mail:yuxiang.ni@swjtu.edu.cn

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

Luyi Sun(孙路易), Fangyuan Zhai(翟方园), Zengqiang Cao(曹增强), Xiaoyu Huang(黄晓宇), Chunsheng Guo(郭春生), Hongyan Wang(王红艳), and Yuxiang Ni(倪宇翔)   

  1. School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2022-12-31 Revised:2023-02-05 Accepted:2023-02-08 Online:2023-04-21 Published:2023-04-21
  • Contact: Yuxiang Ni E-mail:yuxiang.ni@swjtu.edu.cn

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

Abstract: 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.

Key words: Anderson localization, phonons, nanotube superlattices, thermal conductivity

中图分类号:  (Localized modes)

  • 63.20.Pw
63.20.-e (Phonons in crystal lattices) 63.22.Gh (Nanotubes and nanowires) 44.10.+i (Heat conduction)