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	Different effects of grain boundary scattering on charge and heat transport in polycrystalline platinum and gold nanofilms
	Ma Wei-Gang ; Wang Hai-Dong ; Zhang Xing ; Koji, Takahashi
	2010-10-12 ; 2010-10-12
关键词	polycrystalline nanofilm grain boundary scattering thermal and electrical conductivities Wiedemann-Franz law ELECTRICAL-RESISTIVITY MODEL EXTERNAL SURFACES FILMS CONDUCTIVITY REFLECTION Physics, Multidisciplinary
中文摘要	The in-plane electrical and thermal conductivities of several polycrystalline platinum and gold nanofilms with different thickness and measured in a temperature range between the boiling point of liquid nitrogen (77 K) and room temperature by using the direct current heating method. The result shows that both the electrical and thermal conductivities of the nanofilms reduce greatly compared with their corresponding bulk values. However, the electrical conductivity drop is considerably greater than the thermal conductivity drop, which indicates that the influence of the internal grain boundary on heat transport is different from that of charge transport, hence leading to the violation of the Wiedemann-Franz law. We build an electron relaxation model based on Matthiessen's rule to analyse the thermal conductivity and employ the Mayadsa & Shatzkes theory to analyse the electrical conductivity. Moreover, a modified Wiedemann-Franz law is provided in this paper, the obtained results from which are in good agreement with the experimental data.
语种	英语 ; 英语
出版者	IOP PUBLISHING LTD ; BRISTOL ; DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79147]
专题	清华大学
推荐引用方式 GB/T 7714	Ma Wei-Gang,Wang Hai-Dong,Zhang Xing,et al. Different effects of grain boundary scattering on charge and heat transport in polycrystalline platinum and gold nanofilms[J],2010, 2010.
APA	Ma Wei-Gang,Wang Hai-Dong,Zhang Xing,&Koji, Takahashi.(2010).Different effects of grain boundary scattering on charge and heat transport in polycrystalline platinum and gold nanofilms..
MLA	Ma Wei-Gang,et al."Different effects of grain boundary scattering on charge and heat transport in polycrystalline platinum and gold nanofilms".(2010).

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