Strain engineering on the thermal conductivity and heat flux of   thermoelectric Bi2Te3 nanofilm

doi:10.1016/j.nanoen.2015.08.003

CORC > 北京大学 > 信息科学技术学院

	Strain engineering on the thermal conductivity and heat flux of thermoelectric Bi2Te3 nanofilm
	Yu, ChenXi ; Zhang, Gang ; Zhang, Yong-Wei ; Peng, Lian-Mao
刊名	NANO ENERGY
	2015
关键词	Thermal conductivity Strain engineering Thermoelectric Bi2Te3 SILICON NANOWIRES MOLECULAR-DYNAMICS TRANSPORT NANOTUBES FUNDAMENTALS DEPENDENCE GRAPHENE
DOI	10.1016/j.nanoen.2015.08.003
英文摘要	Using molecular dynamic calculations, we studied the strain effects on the thermal conductivity and local heat flux distribution in thermoelectric Bi2Te3 nanofilm. It is found that the thermal conductivity of Bi2Te3 nanofilm can be effectively tuned by strain. Remarkably, a 6% tensile strain is able to reduce the thermal conductivity by 50% white a 4% compressive strain is able to increase the thermal conductivity by 60%. Interestingly, the local heat flux in individual atomic layer responds quite differently to tensile and compressive strain: Tensile strain leads to a more uniform heat flux distribution white compressive strain leads to an opposite trend. Through analyzing the phonon vibrational spectrum, we reveal the underlying physical insights into the relationship among strain, thermal conductivity and heat flux distribution. The present work provides a possible route to effectively tune the thermal conductivity of thermoelectric Bi2Te3 nanofilm through strain engineering. (C) 2015 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [11274011]; Ministry of Science and Technology of China [2011CB933001]; Agency for Science, Technology and Research (A*STAR), Singapore; SCI(E); EI; ARTICLE; zhangg@ihpc.a-star.edu.sg; 104-110; 17
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/424585]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Yu, ChenXi,Zhang, Gang,Zhang, Yong-Wei,et al. Strain engineering on the thermal conductivity and heat flux of thermoelectric Bi2Te3 nanofilm[J]. NANO ENERGY,2015.
APA	Yu, ChenXi,Zhang, Gang,Zhang, Yong-Wei,&Peng, Lian-Mao.(2015).Strain engineering on the thermal conductivity and heat flux of thermoelectric Bi2Te3 nanofilm.NANO ENERGY.
MLA	Yu, ChenXi,et al."Strain engineering on the thermal conductivity and heat flux of thermoelectric Bi2Te3 nanofilm".NANO ENERGY (2015).