Isotope doping-induced crossover shift in the thermal conductivity of thin silicon nanowires

doi:10.1088/1361-648X/acab4a

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	Isotope doping-induced crossover shift in the thermal conductivity of thin silicon nanowires
	Zhou, Ziyue 1; Xu, Ke 1; Song, Zixuan 1; Wang, Zhen 2; Lin, Yanwen 1; Shi, Qiao 1; Hao, Yongchao 1; Fu, Yuequn 3; Zhang, Zhisen 1; Wu, Jianyang 1,4
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2023
卷号	35 期号:8 页码:85702
关键词	IRREVERSIBLE-PROCESSES DYNAMICS SI POTENTIALS DEPENDENCE SCATTERING GROWTH
ISSN号	0953-8984
DOI	10.1088/1361-648X/acab4a
英文摘要	Here, using homogeneous nonequilibrium molecular dynamics simulations, we report the thermal transport characteristics of thin Si nanowires (NWs) with varying size and isotope doping ratio. It is identified that crossover in the thermal conductivity (kappa) of both isotope doping-free and isotope doped Si-NWs appears at critical sizes, below which kappa is enlarged with decreasing size because the hydrodynamic phonon flow predominates, above which, due to the dominant phonon boundary scattering, opposite behavior is observed. With increasing isotope doping, however, the critical size in minimizing the kappa is moved to small values because the phonon impurity scattering caused by isotope doping is critically involved. Moreover, there is a critical isotope doping (<50%) in the critical size motion, originating from that, above which, the critical size no longer moves due to the persistence of hydrodynamic phonon flow. This study provides new insights into the thermal transport behaviors of quasi-1D structures.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/28010]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Xiamen Univ, Res Inst Biomimet & Soft Matter, Jiujiang Res Inst, Dept Phys, Xiamen 361005, Peoples R China 2.Xiamen Univ, Fujian Prov Key Lab Soft Funct Mat Res, Xiamen 361005, Peoples R China 3.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China 4.Univ Oslo, Njord Ctr, Dept Phys, PoreLab, N-0316 Oslo, Norway 5.Norwegian Univ Sci & Technol NTNU, NTNU Nanomech Lab, N-7491 Trondheim, Norway
推荐引用方式 GB/T 7714	Zhou, Ziyue,Xu, Ke,Song, Zixuan,et al. Isotope doping-induced crossover shift in the thermal conductivity of thin silicon nanowires[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2023,35(8):85702.
APA	Zhou, Ziyue.,Xu, Ke.,Song, Zixuan.,Wang, Zhen.,Lin, Yanwen.,...&Wu, Jianyang.(2023).Isotope doping-induced crossover shift in the thermal conductivity of thin silicon nanowires.JOURNAL OF PHYSICS-CONDENSED MATTER,35(8),85702.
MLA	Zhou, Ziyue,et al."Isotope doping-induced crossover shift in the thermal conductivity of thin silicon nanowires".JOURNAL OF PHYSICS-CONDENSED MATTER 35.8(2023):85702.