Ultralow lattice thermal conductivity and exceptional thermoelectric performance in the YbBi2 monolayer induced by strong four-phonon scattering
文献类型：期刊论文
| 作者 | Yu, Meng-Yuan2; Yang, Chuan-Lu2,5; Li, Xiaohu3,4,5; Liu, Yuliang2; Zhao, Wenkai2; Gao, Feng1 |
| 刊名 | MATERIALS RESEARCH BULLETIN
 |
| 出版日期 | 2026 |
| 卷号 | 193页码:113718 |
| 关键词 | Four-phonon scattering Lattice thermal conductivity Thermoelectric Bipolar effect Monolayer |
| ISSN号 | 0025-5408 |
| DOI | 10.1016/j.materresbull.2025.113718 |
| 产权排序 | 2 |
| 英文摘要 | Achieving ultralow lattice thermal conductivity is crucial for high-performance thermoelectric materials and challengeable. Here, we investigate the YbBi2 monolayer, a mechanically, dynamically, and thermodynamically stable material, and uncover an unprecedented reduction in lattice thermal conductivity (kappa l) driven by fourphonon scattering. Specifically, the kappa l values, calculated solely based on three-phonon scattering, are as low as 0.128 (0.377) Wm- 1K- 1 in the x (y) directions at 300 K. Remarkably, four-phonon scattering further suppresses this by 95%, yielding ultralow values of 0.006 (0.022) Wm- 1K- 1. This extraordinary reduction originates from the interplay of the unique quadratic ZA phonon dispersion, pronounced anharmonicity, and reflection symmetry-imposed selection rules. Additionally, the YbBi2 monolayer exhibits a peak power factor of 1.47 mWm- 1K- 2 and an outstanding thermoelectric figure of merit (ZT) of 1.75 at 700 K under intrinsic carrier concentrations with the bipolar effect. These findings position the YbBi2 monolayer as a promising candidate for thermoelectric applications, providing new insights into phonon scattering mechanisms in low-dimensional materials. |
| WOS关键词 | PHONON-SCATTERING ; TRANSPORT ; PHASE ; RATES |
| 资助项目 | National Natural Science Foundation of China[12374232] ; National Natural Science Foundation of China[12473025] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001578551100002 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/8196]  |
| 专题 | 天体化学研究团组 |
| 通讯作者 | Yang, Chuan-Lu |
| 作者单位 | 1.Southern Univ & A & M Coll, Dept Phys, Baton Rouge, LA 70813 USA 2.Ludong Univ, Sch Phys & Optoelect Engn, Yantai 264025, Peoples R China 3.Chinese Acad Sci, Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 4.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Xinjiang, Peoples R China 5.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Meng-Yuan,Yang, Chuan-Lu,Li, Xiaohu,et al. Ultralow lattice thermal conductivity and exceptional thermoelectric performance in the YbBi2 monolayer induced by strong four-phonon scattering[J]. MATERIALS RESEARCH BULLETIN,2026,193:113718. |
| APA | Yu, Meng-Yuan,Yang, Chuan-Lu,Li, Xiaohu,Liu, Yuliang,Zhao, Wenkai,&Gao, Feng.(2026).Ultralow lattice thermal conductivity and exceptional thermoelectric performance in the YbBi2 monolayer induced by strong four-phonon scattering.MATERIALS RESEARCH BULLETIN,193,113718. |
| MLA | Yu, Meng-Yuan,et al."Ultralow lattice thermal conductivity and exceptional thermoelectric performance in the YbBi2 monolayer induced by strong four-phonon scattering".MATERIALS RESEARCH BULLETIN 193(2026):113718. |
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