中国物理B ›› 2023, Vol. 32 ›› Issue (5): 56502-056502.doi: 10.1088/1674-1056/acb764

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

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Lattice thermal conductivity switching via structural phase transition in ferromagnetic VI3

Chao Wu(吴超)1,4 and Chenhan Liu(刘晨晗)1,2,3,†   

  1. 1 Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;
    2 Micro-and Nano-scale Thermal Measurement and Thermal Management Laboratory, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China;
    3 Jiangsu Key Laboratory for Numerical Simulation of Large-Scale Complex Systems, Nanjing Normal University, Nanjing 210023, China;
    4 Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211100, China
  • 收稿日期:2022-11-16 修回日期:2023-01-10 接受日期:2023-01-31 出版日期:2023-04-21 发布日期:2023-04-21
  • 通讯作者: Chenhan Liu E-mail:chenhanliu@njnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 52206092) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20210565). C. Liu was funded by Department of Science and Technology of Jiangsu Province, China (Grant No. BK20220032), Basic Science (Natural Science) Research Project of Higher Education Institutions of Jiangsu Province, China (Grant No. 21KJB470009), and Nanjing Science and Technology Innovation Project for Overseas Students. C. Liu was also funded by "Shuangchuang" Doctor Program of Jiangsu Province, China (Grant No. JSSCBS20210315) and open research fund of Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University (Grant No. KF202010). The authors thank the Scientific Computing Center of Nanjing Normal University and the Big Data Center of Southeast University for performing the numerical calculations presented in this paper.

Lattice thermal conductivity switching via structural phase transition in ferromagnetic VI3

Chao Wu(吴超)1,4 and Chenhan Liu(刘晨晗)1,2,3,†   

  1. 1 Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;
    2 Micro-and Nano-scale Thermal Measurement and Thermal Management Laboratory, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China;
    3 Jiangsu Key Laboratory for Numerical Simulation of Large-Scale Complex Systems, Nanjing Normal University, Nanjing 210023, China;
    4 Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211100, China
  • Received:2022-11-16 Revised:2023-01-10 Accepted:2023-01-31 Online:2023-04-21 Published:2023-04-21
  • Contact: Chenhan Liu E-mail:chenhanliu@njnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 52206092) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20210565). C. Liu was funded by Department of Science and Technology of Jiangsu Province, China (Grant No. BK20220032), Basic Science (Natural Science) Research Project of Higher Education Institutions of Jiangsu Province, China (Grant No. 21KJB470009), and Nanjing Science and Technology Innovation Project for Overseas Students. C. Liu was also funded by "Shuangchuang" Doctor Program of Jiangsu Province, China (Grant No. JSSCBS20210315) and open research fund of Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University (Grant No. KF202010). The authors thank the Scientific Computing Center of Nanjing Normal University and the Big Data Center of Southeast University for performing the numerical calculations presented in this paper.

摘要: The realization of reversible thermal conductivity through ferromagnetic ordering can improve the heat management and energy efficiency in magnetic materials-based devices. VI$_{3}$, as a new layered ferromagnetic semiconductor, exhibits a structural phase transition from monoclinic ($C2/m$) to rhombohedral ($R\bar{3}$) phase as temperature decreases, making it a suitable platform to investigate thermal switching in magnetic phase transition materials. This work reveals that the thermal switching ratio of VI$_{3}$ can reach 3.9 along the $a$-axis. Mechanical properties analysis indicates that the $C2/m$ structure is stiffer than the $R\bar{3}$ one, causing the larger phonon velocity in $C2/m$ phase. Moreover, due to the fewer phonon branches in $C2/m$ phase, the number of phonon-phonon scattering channels in $C2/m$ phase is smaller compared to that of $R\bar{3}$ phase. Both the larger phonon velocity and the longer phonon lifetime lead to larger lattice thermal conductivity in $C2/m$ phase. This study uncovers the mechanical and thermal properties of VI$_{3}$, which provides useful guides for designing magnetic materials-based devices such as thermal switch.

关键词: thermal switching, ferromagnetic ordering, phonons

Abstract: The realization of reversible thermal conductivity through ferromagnetic ordering can improve the heat management and energy efficiency in magnetic materials-based devices. VI$_{3}$, as a new layered ferromagnetic semiconductor, exhibits a structural phase transition from monoclinic ($C2/m$) to rhombohedral ($R\bar{3}$) phase as temperature decreases, making it a suitable platform to investigate thermal switching in magnetic phase transition materials. This work reveals that the thermal switching ratio of VI$_{3}$ can reach 3.9 along the $a$-axis. Mechanical properties analysis indicates that the $C2/m$ structure is stiffer than the $R\bar{3}$ one, causing the larger phonon velocity in $C2/m$ phase. Moreover, due to the fewer phonon branches in $C2/m$ phase, the number of phonon-phonon scattering channels in $C2/m$ phase is smaller compared to that of $R\bar{3}$ phase. Both the larger phonon velocity and the longer phonon lifetime lead to larger lattice thermal conductivity in $C2/m$ phase. This study uncovers the mechanical and thermal properties of VI$_{3}$, which provides useful guides for designing magnetic materials-based devices such as thermal switch.

Key words: thermal switching, ferromagnetic ordering, phonons

中图分类号:  (Thermal properties of graphene)

  • 65.80.Ck
77.80.Fm (Switching phenomena) 77.80.B- (Phase transitions and Curie point)