Stretch-Driven Increase in Ultrahigh Thermal Conductance of Hydrogenated Borophene and Dimensionality Crossover in Phonon Transmission | |
Li, Dengfeng1; He, Jia1; Ding, Guangqian1; Tang, QiQi1; Ying, Yan1; He, Junjie1; Zhong, Chengyong1; Liu, Yi1; Feng, Chunbao1; Sun, Qilong2![]() | |
刊名 | ADVANCED FUNCTIONAL MATERIALS
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2018-08-01 | |
卷号 | 28期号:31页码:7 |
关键词 | Borophene Phonon Dispersion Phonon Transmission Strain Effect Thermal Conductance |
ISSN号 | 1616-301X |
DOI | 10.1002/adfm.201801685 |
英文摘要 | Inspirited by the wide range of applications of graphene and the similarity between boron and carbon, 2D boron sheets have gained extensive research interest. In this work, using first-principles combined with a nonequilibrium Green's function method, thermal conductance of fully hydrogenated borophene, named borophane, is studied. Interestingly and in contrast to widely perceived sense, at 300 K, it is found that the thermal conductance of borophane in the armchair direction is remarkably larger than that of graphene. More interesting, a dimensionality crossover is observed in phonon transmission where low-frequency phonons exhibit 2D characteristic, while high-frequency phonons behave like a 1D system, oriented along armchair direction, which results in the ultrahigh thermal conductance. An anomalous increase of thermal conductance with uniaxial tensile strain is observed, which is well explained by the unique puckered structure and chemical bonding in borophane. The excellent in-plane stiffness and flexibility together with the high thermal conductance suggest that borophane is promising for soft thermal channel. Moreover, this unique dimensionality crossover in phonon transmission offers a perfect platform for studying the effect of phonon population in mode space, which is of primary importance for thermal transport in low-dimensional systems. |
资助项目 | National Natural Science Foundation of China[11604035] ; Science and Engineering Research Council[152-70-00017] |
WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
语种 | 英语 |
出版者 | WILEY-V C H VERLAG GMBH |
WOS记录号 | WOS:000440283900015 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.138/handle/2HOD01W0/6561] ![]() |
专题 | 高性能计算应用研究中心 |
作者单位 | 1.Chongqing Univ Posts & Telecommun, Sch Sci, Chongqing 400065, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.ASTAR, Inst High Performance Comp, Singapore 138632, Singapore |
推荐引用方式 GB/T 7714 | Li, Dengfeng,He, Jia,Ding, Guangqian,et al. Stretch-Driven Increase in Ultrahigh Thermal Conductance of Hydrogenated Borophene and Dimensionality Crossover in Phonon Transmission[J]. ADVANCED FUNCTIONAL MATERIALS,2018,28(31):7. |
APA | Li, Dengfeng.,He, Jia.,Ding, Guangqian.,Tang, QiQi.,Ying, Yan.,...&Zhang, Gang.(2018).Stretch-Driven Increase in Ultrahigh Thermal Conductance of Hydrogenated Borophene and Dimensionality Crossover in Phonon Transmission.ADVANCED FUNCTIONAL MATERIALS,28(31),7. |
MLA | Li, Dengfeng,et al."Stretch-Driven Increase in Ultrahigh Thermal Conductance of Hydrogenated Borophene and Dimensionality Crossover in Phonon Transmission".ADVANCED FUNCTIONAL MATERIALS 28.31(2018):7. |
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