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论文成果
3-X Structural Model and Common Characteristics of Anomalous Thermal Transport: The Case of Two-Dimensional Boron Carbides
- 发布时间：2022-07-18
- 点击次数：
- 影响因子：6.888
- DOI码：10.1021/acs.jpclett.1c03248
- 所属单位：中国矿业大学
- 教研室：材料与物理学院
- 发表刊物：The Journal of Physical Chemistry Letters
- 刊物所在地：美国
- 项目来源：国家自然科学基金
- 关键字：Anharmonicity; 3-X structural model; 2D BN
- 摘要：Improving the reliability of electronic devices requires effective heat management, and the key is the relationship between the thermal transport and temperature. Inspired by synthesized T-carbon and H-boron, the 3-X structural models are proposed to unify the two-dimensional (2D) multitriangle materials. Employing structural searches, we identify the stability of the 3-X configuration in 2D boron carbides as 3-9 BC3 monolayer, which, unexpectedly, exhibits a linear thermal conductivity versus temperature, not the traditional ∼1/T trend. We summarize the common characteristics and explore why this behavior is absent in 3-9 AlC3 and graphene via investigating the optical modes. We show that the linear behavior is a direct consequence of the special oscillation modes by the 3-X model associated with the largest group velocity. We find that 2D materials with such behavior usually share a relatively low thermal conductivity. Our work paves the way to deeply understand the lattice thermal transport and to widen nanoelectronic applications.
- 备注：Hanpu Liang, Hongzhen Zhong, Sheng Huang, and Yifeng Duan*
- 论文类型：期刊论文
- 学科门类：理学
- 一级学科：物理学
- 卷号：12
- 期号：45
- 页面范围：10975–10980
- ISSN号：1948-7185
- 是否译文：否
- 发表时间：2021-11-03
- 收录刊物：SCI
- 发布期刊链接：https://pubs.acs.org/doi/10.1021/acs.jpclett.1c03248?ref=pdf