Vibrational hierarchy leads to dual-phonon transport in low thermal conductivity crystals

doi:10.1038/s41467-020-16371-w

IMR OpenIR

	Vibrational hierarchy leads to dual-phonon transport in low thermal conductivity crystals
	Luo, Yixiu 1,2,3; Yang, Xiaolong 1,2,4; Feng, Tianli 5; Wang, Jingyang 3; Ruan, Xiulin 1,2
通讯作者	Ruan, Xiulin(ruan@purdue.edu)
	2020-05-22
发表期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
卷号	11 期号:1 页码:10
摘要	Many low-thermal-conductivity (kappa (L)) crystals show intriguing temperature (T) dependence of kappa (L): kappa T-L(-1) (crystal-like) at intermediate temperatures whereas weak T-dependence (glass-like) at high temperatures. It has been in debate whether thermal transport can still be described by phonons at the Ioffe-Regel limit. In this work, we propose that most phonons are still well defined for thermal transport, whereas they carry heat via dual channels: normal phonons described by the Boltzmann transport equation theory, and diffuson-like phonons described by the diffusion theory. Three physics-based criteria are incorporated into first-principles calculations to judge mode-by-mode between the two phonon channels. Case studies on La2Zr2O7 and Tl3VSe4 show that normal phonons dominate low temperatures while diffuson-like phonons dominate high temperatures. Our present dual-phonon theory enlightens the physics of hierarchical phonon transport as approaching the Ioffe-Regel limit and provides a numerical method that should be practically applicable to many materials with vibrational hierarchy. p id=Par Predicting thermal transport in low-thermal-conductivity (kappa (L)) materials is challenging. Here, the authors propose a dual-phonon theory, where normal phonons are treated using the Boltzmann thermal equation and diffuson-like phonons are treated within diffusion theory, yielding robust predictions of kappa (L).
资助者	China Scholarship Council ; Shenyang National Laboratory for Materials Science ; project entitled Models to Evaluate and Guide the Development of Low Thermal Conductivity Materials for Building Envelopes - Building Technologies Office (BTO), Office of Energy Efficiency & Renewable Energy (EERE) at the Department of Energy (DOE) ; Defense Advanced Research Projects Agency
DOI	10.1038/s41467-020-16371-w
收录类别	SCI
语种	英语
资助项目	China Scholarship Council ; Shenyang National Laboratory for Materials Science ; project entitled Models to Evaluate and Guide the Development of Low Thermal Conductivity Materials for Building Envelopes - Building Technologies Office (BTO), Office of Energy Efficiency & Renewable Energy (EERE) at the Department of Energy (DOE) ; Defense Advanced Research Projects Agency[HR0011-15-2-0037]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000537134500001
出版者	NATURE PUBLISHING GROUP
引用统计	被引频次：135[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/139061
专题	中国科学院金属研究所
通讯作者	Ruan, Xiulin
作者单位	1.Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA 2.Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 4.Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China 5.Oak Ridge Natl Lab, Energy & Transportat Sci Div, Oak Ridge, TN 37831 USA
推荐引用方式 GB/T 7714	Luo, Yixiu,Yang, Xiaolong,Feng, Tianli,et al. Vibrational hierarchy leads to dual-phonon transport in low thermal conductivity crystals[J]. NATURE COMMUNICATIONS,2020,11(1):10.
APA	Luo, Yixiu,Yang, Xiaolong,Feng, Tianli,Wang, Jingyang,&Ruan, Xiulin.(2020).Vibrational hierarchy leads to dual-phonon transport in low thermal conductivity crystals.NATURE COMMUNICATIONS,11(1),10.
MLA	Luo, Yixiu,et al."Vibrational hierarchy leads to dual-phonon transport in low thermal conductivity crystals".NATURE COMMUNICATIONS 11.1(2020):10.