Revisiting lattice thermal conductivity of CsCl: The crucial role of quartic anharmonicity

Wang, Xiaoying1; Feng, Minxuan1; Xia, Yi2; Sun, Jun1; Ding, Xiangdong1; Li, Baowen3,4; Gao, Zhibin1

2024-04-22

10.1063/5.0201393

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

Thermal conductivity ( K-L) plays a critical role in thermal management applications. Usually, crystals with simpler structures exhibit higher K-L due to fewer phonon scatterings. However, cesium chloride (CsCl) presents an anomaly, demonstrating an unexpectedly low K-L of 1.0 W m(-1) K-1 at 300 K, as observed in Professor Iversen's experimental measurement despite its simple structure. This prompts a need for understanding anomalous low K-L and matching theory with experimental observations. Our study brings forth several findings for CsCl: (i) relying solely on three-phonon scattering inadequately captures K-L. (ii) Anharmonic phonon renormalization significantly contributes to increased K-L. (iii) Coherent phonons align temperature-dependent K-L closely with the experiment. This work not only enhances understanding of anomalous K-L in CsCl but also provides an approach to bridge the gap between experiment and theory in other crystals

SCI ; EI

英语

其他

Key Research and Development Program of the Ministry of Science and Technology[2023YFB4604100] ; National Natural Science Foundation of China["12104356","52250191"] ; China Postdoctoral Science Foundation[2022M712552]

Physics

Physics, Applied

WOS:001206889200008

AIP Publishing

PHYSICS

Web of Science

1.Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
2.Portland State Univ, Dept Mech & Mat Engn, Portland, OR 97201 USA
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Dept Phys, Shenzhen 518055, Peoples R China
4.Int Quantum Acad, Shenzhen 518048, Peoples R China

Wang, Xiaoying,Feng, Minxuan,Xia, Yi,et al. Revisiting lattice thermal conductivity of CsCl: The crucial role of quartic anharmonicity[J]. APPLIED PHYSICS LETTERS,2024,124(17).

Wang, Xiaoying.,Feng, Minxuan.,Xia, Yi.,Sun, Jun.,Ding, Xiangdong.,...&Gao, Zhibin.(2024).Revisiting lattice thermal conductivity of CsCl: The crucial role of quartic anharmonicity.APPLIED PHYSICS LETTERS,124(17).

Wang, Xiaoying,et al."Revisiting lattice thermal conductivity of CsCl: The crucial role of quartic anharmonicity".APPLIED PHYSICS LETTERS 124.17(2024).